研究者データベース

中島 宏(ナカシマ ヒロシ)
工学研究院 応用量子科学部門 原子力支援社会基盤技術分野(寄附分野)
特任教授

基本情報

所属

  • 工学研究院 応用量子科学部門 原子力支援社会基盤技術分野(寄附分野)

職名

  • 特任教授

学位

  • 博士(工学)(1992年03月 東北大学)

論文上での記載著者名

  • Hiroshi Nakashima
  • H. Nakashima

J-Global ID

研究キーワード

  • 粒子   照射効果   超高エネルギー   高エネルギー   物質内挙動   加速器   挙動   遮蔽   Shielding   

職歴

  • 2020年04月 - 現在 北海道大学 大学院工学研究院 応用量子科学部門 原子力支援社会基盤技術講座 特任教授
  • 2018年04月 - 2020年03月 国立研究開発法人日本原子力研究開発機構 原子力科学研究所 副所長

学歴

  •         - 1984年03月   東北大学   大学院工学研究科   原子核工学専攻修士課程
  •         - 1982年   東北大学   工学部   原子核工学科

研究活動情報

論文

  • Yoichi Kirihara, Hiroshi Nakashima, Toshiya Sanami, Yoshihito Namito, Toshiro Itoga, Shuji Miyamoto, Akinori Takemoto, Masashi Yamaguchi, Yoshihiro Asano
    JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY 57 4 444 - 456 2020年04月 [査読有り][通常論文]
     
    The neutron-emission spectrum from a 197Au target excited with a 16.6 +/- 0.2 MeV, monoenergetic, linearly polarized photon beam was measured using the time-of-flight method at the NewSUBARU-BL01. Two components were clearly detected in the neutron spectrum produced by photonuclear reactions. One component [component (A)] shows an evaporation-like spectrum with energies up to 4 MeV. The spectrum of the other component [component (B)] is shaped like a bump and energies >= 4 MeV. The intensity of the component (A) does not show any definite angular dependence, whereas, that of the component (B) follows the relation [a+ b cos(2 Theta)] as a function of the angle Theta between the polarization and detector directions.
  • Yoichi Kirihara, Toshiro Itoga, Toshiya Sanami, Hiroshi Nakashima, Yoshihito Namito, Shuji Miyamoto, Akinori Takemoto, Masashi Yamaguchi, Yoshihiro Asano
    EPJ Web of Conferences 153 2017年09月25日 [査読有り][通常論文]
     
    © The Authors, published by EDP Sciences, 2017. Spectra of neutrons produced by a photonuclear reaction from a 197Au target were measured using 16.95 MeV linearly and circularly polarized photon beams at NewSUBARU-BL01 using a time-of-flight method. The difference in the neutron spectra between the cases of a linearly and circularly polarized photon was measured. The difference in the neutron yield increased with the neutron energy and was approximately threefold at the maximum neutron energy. In a direction perpendicular to that of the linear polarization, the neutron yields decreased as the neutron energy increased.
  • Toshiro Itoga, Hiroshi Nakashima, Toshiya Sanami, Yoshihito Namito, Yoichi Kirihara, Shuji Miyamoto, Akinori Takemoto, Masashi Yamaguchi, Yoshihiro Asano
    EPJ Web of Conferences 153 2017年09月25日 [査読有り][通常論文]
     
    © The Authors, published by EDP Sciences, 2017. Photo-neutron energy spectra for Eg=23.1 and 26.6 MeV mono-energetic photons on natC were measured using laser Compton scattering facility at NewSUBARU BL01. The photon energy spectra were evaluated through measurements and simulations with collimator sizes and arrangements for the laser electron photon. The neutron energy spectra for the natC(g,xn) reaction were measured at 60 degrees in horizontal and 90 degrees in horizontal and vertical with respect to incident photon. The spectra show almost isotropic angular distribution and flat energy distribution from detection threshold to upper limit defined by reaction Q-value.
  • Yoshihiro Nakane, Yosuke Iwamoto, Masayuki Hagiwara, Hiroshi Iwase, Tatsuhiko Sato, Akihiko Masuda, Tetsuro Matsumoto, Tomoya Nunomiya, Hiroshi Yashima, Daiki Satoh, Hiroshi Nakashima, Tatsushi Shima, Atsushi Tamii, Kichiji Hatanaka, Takashi Nakamura
    EPJ Web of Conferences 153 2017年09月25日 [査読有り][通常論文]
     
    © The Authors, published by EDP Sciences, 2017. Shielding benchmark experiments are useful to verify the accuracy of calculation methods for the radiation shielding designs of high-energy accelerator facilities. In the present work, the benchmark experiments were carried out for 244- and 387-MeV quasi-monoenergetic neutron field at RCNP of Osaka University. Neutron dose rates through the test shields, 100-300 cm thick concrete and 40-100 cm thick iron, were measured by four kinds of neutron dose equivalent monitors, three kinds of wide-energy range monitors applied to high-energy neutron fields above 20 MeV and a conventional type rem monitor for neutrons up to 20 MeV, placed behind the test shields. Measured dose rates were compared one another. Measured results with the wide-energy range monitors were in agreement one another for both the concrete and the iron shields. For the conventional type rem monitor, measured results are smaller than those with the wide-energy range monitors for the concrete shields, while that are in agreements for the iron shields. The attenuation lengths were obtained from the measurements. The lengths from all the monitors are in agreement on the whole, though some differences are shown. These results are almost same as those from others measured at several hundred MeV neutron fields.
  • Masayuki Hagiwara, Hiroshi Iwase, Yosuke Iwamoto, Daiki Satoh, Tetsuro Matsumoto, Akihiko Masuda, Hiroshi Yashima, Yoshihiro Nakane, Hiroshi Nakashima, Yukio Sakamoto, Tatsushi Shima, Atsushi Tamii, Kichiji Hatanaka, Takashi Nakamura
    EPJ Web of Conferences 153 2017年09月25日 [査読有り][通常論文]
     
    © The Authors, published by EDP Sciences, 2017. A shielding benchmark experiment has been performed using a quasi-monoenergetic 7 Li(p,n) neutron source with the peak energies of 244 and 387 MeV at the Research Center for Nuclear Physics (RCNP) of Osaka University, in order to assess the accuracy of nuclear data and calculation codes used in high-energy accelerator shielging design. Energy spectra behind bulk shields of 10- to 100-cm-thick iron, 25- to 300-cm-thick concrete and their composite are measured using a NE213 organic liquid scintillator with a diameter and thickness of 25.4 cm each with a time-of-flight and an unfolding method. The neutron attenuation lengths are illustared for iron and concrete as a function of the incident energy.
  • Tatsuhiko Sato, Kotaro Tsuboi, Hiroshi Nakashima, Kazuyuki Emi
    GRAEFES ARCHIVE FOR CLINICAL AND EXPERIMENTAL OPHTHALMOLOGY 255 4 665 - 671 2017年04月 [査読有り][通常論文]
     
    The purpose of this study was to compare ocular and systemic parameters between proliferative diabetic retinopathy (PDR) cases with postoperative vitreous hemorrhage (PVH) and those without PVH after 25-gauge vitrectomy, and to investigate the predictors of PVH. The medical records of 106 eyes of 78 consecutive patients who underwent primary 25-gauge vitrectomy were reviewed. The incidences of early and late PVH were found to be 18.9 % (20/106 eyes) and 17.9 % (19/106 eyes) respectively. On multiple logistic regression analysis, intraoperative bleeding from new vessels on the disc was identified as the most important factor, with the greatest odds ratio, for the development of early PVH (odds ratio = 3.395, P = 0.134), while the HbA1c level was identified as the most important significant factor, with the greatest odds ratio, for the development of late PVH (odds ratio = 1.403, P = 0.014). Early PVH tends to occur in severe PDR cases, while late PVH tends to occur in cases with poor diabetic control.
  • Theis C, Carbonez P, Feldbaumer E, Forkel-Wirth D, Jaegerhofer L, Pangallo M, Perrin D, Urscheler C, Roesler S, Vincke H, Widorski M, Iwamoto Y, Hagiwara M, Satoh D, Iwase H, Yashima H, Matsumoto T, Masuda A, Nishiyama J, Harano H, Itoga T, Nakamura T, Sato T, Nakane Y, Nakashima H, Sakamoto Y, Taniguchi S, Nakao N, Tamii A, Shima T, Hatanaka K
    Icrs-13 & Rpsd-2016, 13th International Conference on Radiation Shielding & 19th Topical Meeting of the Radiation Protection and Shielding Division of the American Nuclear Society - 2016 153 2017年 [査読有り][通常論文]
  • Yoichi Kirihara, Toshiro Itoga, Toshiya Sanami, Hiroshi Nakashima, Yoshihito Namito, Shuji Miyamoto, Akinori Takemoto, Masashi Yamaguchi, Yoshihiro Asano
    ICRS-13 & RPSD-2016, 13TH INTERNATIONAL CONFERENCE ON RADIATION SHIELDING & 19TH TOPICAL MEETING OF THE RADIATION PROTECTION AND SHIELDING DIVISION OF THE AMERICAN NUCLEAR SOCIETY - 2016 153 2017年 [査読有り][通常論文]
     
    Spectra of neutrons produced by a photonuclear reaction from a Au-197 target were measured using 16.95 MeV linearly and circularly polarized photon beams at NewSUBARU-BL01 using a time-of-flight method. The difference in the neutron spectra between the cases of a linearly and circularly polarized photon was measured. The difference in the neutron yield increased with the neutron energy and was approximately threefold at the maximum neutron energy. In a direction perpendicular to that of the linear polarization, the neutron yields decreased as the neutron energy increased.
  • Itoga T, Nakashima H, Sanami T, Namito Y, Kirihara Y, Miyamoto S, Takemoto A, Yamaguchi M, Asano Y
    EPJ Web of Conferences 153 2017年 [査読有り][通常論文]
  • Yoshihiro Nakane, Yosuke Iwamoto, Masayuki Hagiwara, Hiroshi Iwase, Tatsuhiko Sato, Akihiko Masuda, Tetsuro Matsumoto, Tomoya Nunomiya, Hiroshi Yashima, Daiki Satoh, Hiroshi Nakashima, Tatsushi Shima, Atsushi Tamii, Kichiji Hatanaka, Takashi Nakamura
    ICRS-13 & RPSD-2016, 13TH INTERNATIONAL CONFERENCE ON RADIATION SHIELDING & 19TH TOPICAL MEETING OF THE RADIATION PROTECTION AND SHIELDING DIVISION OF THE AMERICAN NUCLEAR SOCIETY - 2016 153 2017年 [査読有り][通常論文]
     
    Shielding benchmark experiments are useful to verify the accuracy of calculation methods for the radiation shielding designs of high-energy accelerator facilities. In the present work, the benchmark experiments were carried out for 244- and 387-MeV quasi-monoenergetic neutron field at RCNP of Osaka University. Neutron dose rates through the test shields, 100-300 cm thick concrete and 40-100 cm thick iron, were measured by four kinds of neutron dose equivalent monitors, three kinds of wide-energy range monitors applied to high-energy neutron fields above 20 MeV and a conventional type rem monitor for neutrons up to 20 MeV, placed behind the test shields. Measured dose rates were compared one another. Measured results with the wide-energy range monitors were in agreement one another for both the concrete and the iron shields. For the conventional type rem monitor, measured results are smaller than those with the wide-energy range monitors for the concrete shields, while that are in agreements for the iron shields. The attenuation lengths were obtained from the measurements. The lengths from all the monitors are in agreement on the whole, though some differences are shown. These results are almost same as those from others measured at several hundred MeV neutron fields.
  • Hagiwara Masayuki, Iwase Hiroshi, Iwamoto Yosuke, Satoh Daiki, Matsumoto Tetsuro, Masuda Akihiko, Yashima Hiroshi, Nakane Yoshihiro, Nakashima Hiroshi, Sakamoto Yukio, Shima Tatsushi, Tamii Atsushi, Hatanaka Kichiji, Nakamura Takashi
    ICRS-13 & RPSD-2016, 13TH INTERNATIONAL CONFERENCE ON RADIATION SHIELDING & 19TH TOPICAL MEETING OF THE RADIATION PROTECTION AND SHIELDING DIVISION OF THE AMERICAN NUCLEAR SOCIETY - 2016 153 2017年 [査読有り][通常論文]
  • Kunieda, Satoshi, Iwamoto, Osamu, Iwamoto, Nobuyuki, Minato, Futoshi, Okamoto, Tsutomu, Sato, Tatsuhiko, Nakashima, Hiroshi, Iwamoto, Yosuke, Iwamoto, Hiroki, Kitatani, Fumito, Fukahori, Tokio, Watanabe, Yukinobu, Shigyo, Nobuhiro, Chiba, Satoshi, Yamano, Naoki, Hagiwara, Masayuki, Niita, Koji, Kosako, Kazuaki, Hirayama, Shusuke, Murata, Toru
    JAEA-Conf 2016-004 41 - 46 2016年09月 [査読無し][通常論文]
  • S. Sekimoto, S. Okumura, H. Yashima, Y. Matsushi, H. Matsuzaki, H. Matsumura, A. Toyoda, K. Oishi, N. Matsuda, Y. Kasugai, Y. Sakamoto, H. Nakashima, D. Boehnlein, R. Coleman, G. Lauten, A. Leveling, N. Mokhov, E. Ramberg, A. Soha, K. Vaziri, K. Ninomiya, T. Omoto, T. Shima, N. Takahashi, A. Shinohara, M. W. Caffee, K. C. Welten, K. Nishiizumi, S. Shibata, T. Ohtsuki
    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS 361 685 - 688 2015年10月 [査読有り][通常論文]
     
    The production cross sections of Be-10 and Al-26 were measured by accelerator mass spectrometry using Y-89, Tb-159, and Cu-nat targets bombarded by protons with energies E-p of 120 GeV and 392 MeV. The production cross sections obtained for Be-10 and Al-26 were compared with those previously reported using E-p = 50 MeV-24 GeV and various targets. It was found that the production cross sections of Be-10 monotonically increased with increasing target mass number when the proton energy was greater than a few GeV. On the other hand, it was also found that the production cross sections of Be-10 decreased as the target mass number increased from that of carbon to those near the mass numbers of nickel and zinc when the proton energy was below approximately 1 GeV. They also increased as the target mass number increased from near those of nickel and zinc to that of bismuth, in the same proton energy range. Similar results were observed in the production cross sections of Al-26, though the absolute values were quite different between Be-10 and Al-26. The difference between these production cross sections may depend on the impact parameter (nuclear radius) and/or the target nucleus stiffness. (C) 2015 Elsevier B.V. All rights reserved.
  • Tatsuhiko Sato, Koji Niita, Norihiro Matsuda, Shintaro Hashimoto, Yosuke Iwamoto, Takuya Furuta, Shusaku Noda, Tatsuhiko Ogawa, Hiroshi Iwase, Hiroshi Nakashima, Tokio Fukahori, Keisuke Okumura, Tetsuya Kai, Satoshi Chiba, Lembit Sihver
    ANNALS OF NUCLEAR ENERGY 82 110 - 115 2015年08月 [査読有り][通常論文]
     
    A general purpose Monte Carlo Particle and Heavy Ion Transport code System, PHITS, is being developed through the collaboration of several institutes in Japan and Europe. The Japan Atomic Energy Agency is responsible for managing the entire project. PHITS can deal with the transport of nearly all particles, including neutrons, protons, heavy ions, photons, and electrons, over wide energy ranges using various nuclear reaction models and data libraries. It is written in Fortran language and can be executed on almost all computers. All components of PHITS such as its source, executable and data-library files are assembled in one package and then distributed to many countries via the Research Organization for Information Science and Technology, the Data Bank of the Organization for Economic Co-operation and Development's Nuclear Energy Agency, and the Radiation Safety Information Computational Center. More than 1500 researchers have been registered as PHITS users, and they apply the code to various research and development fields such as nuclear technology, accelerator design, medical physics, and cosmic-ray research. This paper briefly summarizes the physics models implemented in PHITS, and introduces some important functions useful for specific applications, such as an event generator mode and beam transport functions. (C) 2014 Elsevier Ltd. All rights reserved.
  • Hiroshi Matsumura, Shun Sekimoto, Y. Kasugai, Y. Kasugai, Y. Kasugai, Y. Kasugai, Y. Kasugai, H. Yashima, H. Yashima, H. Yashima, H. Yashima, H. Yashima, A. Toyoda, A. Toyoda, A. Toyoda, A. Toyoda, A. Toyoda, N. Matsuda, N. Matsuda, N. Matsuda, N. Matsuda, N. Matsuda, K. Bessho, K. Bessho, K. Bessho, K. Bessho, K. Bessho, N. Mokhov, N. Mokhov, N. Mokhov, N. Mokhov, N. Mokhov, A. Leveling, A. Leveling, A. Leveling, A. Leveling, A. Leveling, D. Boehnlein, D. Boehnlein, D. Boehnlein, D. Boehnlein, D. Boehnlein, G. Lauten, G. Lauten, G. Lauten, G. Lauten, G. Lauten, W. Schmitt, W. Schmitt, W. Schmitt, W. Schmitt, W. Schmitt, K. Oishi, K. Oishi, K. Oishi, K. Oishi, K. Oishi, Y. Sakamoto, Y. Sakamoto, Y. Sakamoto, Y. Sakamoto, Y. Sakamoto, H. Nakashima, H. Nakashima, H. Nakashima, H. Nakashima, H. Nakashima
    Transactions of the American Nuclear Society 112 13 - 16 2015年01月01日 [査読無し][通常論文]
     
    Water samples were collected from five cooling water systems for the NuMI beamline and from three cooling water systems for the antiproton production target station immediately after the shutdown of the accelerators for maintenance. Then, the colloid formation rates of the radionuclides were measured by ultrafiltration and γ-ray spectrometry. The colloid formation rates of the radionuclides in cooling water systems with a deionizer were higher than in those without a deionizer. This indicated that the incomplete removal of the radionuclides is caused by the weak retention of the colloids on the ion-exchange resin. In particular, the remaining 7Be was due to the weak retention of positively charged colloids on cation-exchange resins in the deionizer.
  • T. Kajimoto, N. Shigyo, T. Sanami, Y. Iwamoto, M. Hagiwara, H. S. Lee, A. Soha, E. Ramberg, R. Coleman, D. Jensen, A. Leveling, N. V. Mokhov, D. Boehnlein, K. Vaziri, Y. Sakamoto, K. Ishibashi, H. Nakashima
    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS 337 15 68 - 77 2014年10月 [査読有り][通常論文]
     
    The energy spectra of neutrons were measured by a time-of-flight method for 120 GeV protons on thick graphite, aluminum, copper, and tungsten targets with an NE213 scintillator at the Fermilab Test Beam Facility. Neutron energy spectra were obtained between 25 and 3000 MeV at emission angles of 30 degrees, 45 degrees, 120 degrees, and 150 degrees. The spectra were parameterized as neutron emissions from three moving sources and then compared with theoretical spectra calculated by PHITS and FLUKA codes. The yields of the theoretical spectra were substantially underestimated compared with the yields of measured spectra. The integrated neutron yields from 25 to 3000 MeV calculated with PHITS code were 16-36% of the experimental yields and those calculated with FLUKA code were 26-57% of the experimental yields for all targets and emission angles. (C) 2014 Elsevier B.V. All rights reserved.
  • H. Kumada, A. Matsumura, H. Sakurai, T. Sakae, M. Yoshioka, H. Kobayashi, H. Matsumoto, Y. Kiyanagi, T. Shibata, H. Nakashima
    APPLIED RADIATION AND ISOTOPES 88 211 - 215 2014年06月 [査読有り][通常論文]
     
    A project team headed by University of Tsukuba launched the development of a new accelerator based BNCT facility. In the project, we have adopted Radio-Frequency Quadrupole (RFQ)+Drift Tube Linac (DTL) type linac as proton accelerators. Proton energy generated from the linac was set to 8 MeV and average current was 10 mA. The linac tube has been constructed by Mitsubishi Heavy Industry Co. For neutron generator device, beryllium is selected as neutron target material; high intensity neutrons are generated by the reaction with beryllium and the 80 kW proton beam. Our team chose beryllium as the neutron target material. At present beryllium target system is being designed with Monte-Carlo estimations and heat analysis with ANSYS. The neutron generator consists of moderator, collimator and shielding. It is being designed together with the beryllium target system. We also acquired a building in Tokai village; the building has been renovated for use as BNCT treatment facility. It is noteworthy that the linac tube had been installed in the facility in September 2012. In BNCT procedure, several medical devices are required for BNCT treatment such as treatment planning system, patient positioning device and radiation monitors. Thus these are being developed together with the linac based neutron source. For treatment planning system, we are now developing a new multi-modal Monte-Carlo treatment planning system based on JCDS. The system allows us to perform dose estimation for BNCT as well as particle radiotherapy and X-ray therapy. And the patient positioning device can navigate a patient to irradiation position quickly and properly. Furthermore the device is able to monitor movement of the patient's position during irradiation. (C) 2014 Elsevier Ltd. All rights reserved.
  • H. Matsumura, N. Matsuda, Y. Kasugai, A. Toyoda, H. Yashima, S. Sekimoto, H. Iwase, K. Oishi, Y. Sakamoto, H. Nakashima, A. Leveling, D. Boehnlein, G. Lauten, N. Mokhov, K. Vaziri
    NUCLEAR DATA SHEETS 120 219 - 221 2014年06月 [査読有り][通常論文]
     
    In our previous study, double and mirror symmetric activation peaks found for Al and Au arranged spatially on the back of the Hadron absorber of the NuMI beamline in Fermi lab were considerably higher than those expected purely from muon-induced reactions. From material activation benchmark experiments, we conclude that this activation is due to hadrons with energy greater than 3 GeV that had passed downstream through small gaps in the hadron absorber.
  • Masayuki Hagiwara, Hiroshi Iwase, Yosuke Iwamoto, Daiki Satoh, Tetsuro Matsumoto, Akihiko Masuda, Hiroshi Yashima, Yoshihiro Nakane, Hiroshi Nakashima, Yukio Sakamoto, Atsushi Tamii, Kichiji Hatanaka, Takashi Nakamura
    Progress in Nuclear Science and Technology 4 327 - 331 2014年04月 [査読有り][通常論文]
  • MATSUMURA Hiroshi, SEKIMOTO Shun, YASHIMA Hiroshi, TOYODA Akihiro, KASUGAI Yoshimi, MATSUDA Norihiro, OISHI Koji, BESSHO Kotaro, SAKAMOTO Yukio, NAKASHIMA Hiroshi, BOEHNLEIN David, LAUTEN Gary, LEVELING Anthony, MOKHOV Nikolai, VAZIRI Kamran
    Prog Nucl Sci Technol (Web) 4 372-375 (WEB ONLY)  2014年04月 [査読無し][通常論文]
  • MATSUDA Norihiro, KASUGAI Yoshimi, MATSUMURA Hiroshi, IWASE Hiroshi, TOYODA Akihiro, YASHIMA Hiroshi, SEKIMOTO Shun, OISHI Koji, SAKAMOTO Yukio, NAKASHIMA Hiroshi, NAKAMURA Takashi, BOEHNLEIN David, LAUTEN Gary, LEVELING Anthony, MOKHOV Nikolai, VAZIRI Kamran
    Prog Nucl Sci Technol (Web) 4 337-340 (WEB ONLY)  2014年04月 [査読無し][通常論文]
  • Hiroshi Matsumura, Shun Sekimoto, Yoshimi Kasugai, Hiroshi Yashima, Akihiro Toyoda, Norihiro Matsuda, Kotaro Bessho, Nikolai Mokhov, Anthony Leveling, David Boehnlein, Gary Lauten, Wayne Schmitt, Koji Oishi, Yukio Sakamoto, Hiroshi Nakashima
    18th Topical Meeting of the Radiation Protection and Shielding Division of ANS, RPSD 2014 310 - 313 2014年01月01日 [査読無し][通常論文]
  • Tatsuhiko Sato, Koji Niita, Norihiro Matsuda, Shintaro Hashimoto, Yosuke Iwamoto, Shusaku Noda, Hiroshi Iwase, Hiroshi Nakashima, Tokio Fukahori, Satoshi Chiba, Lembit Sihve
    Progress in Nuclear Science and Technology 4 879 - 882 The Atomic Energy Society of Japan 2014年 [査読有り][通常論文]
  • Yoshihiro Nakane, Masayuki Hagiwara, Yosuke Iwamoto, Hiroshi Iwase, Daiki Satoh, Tatsuhiko Sato, Hiroshi Yashima, Tetsuro Matsumoto, Akihiko Masuda, Tomoya Nunomiya, Yukio Sakamoto, Hiroshi Nakashima, Atsushi Tamii, Kichiji Hatanaka, Takashi Nakamur
    Progress in Nuclear Science and Technology 4 704 - 708 The Atomic Energy Society of Japan 2014年 [査読有り][通常論文]
  • Masayuki Hagiwara, Hiroshi Iwase, Yosuke Iwamoto, Daiki Satoh, Tetsuro Matsumoto, Akihiko Masuda, Hiroshi Yashima, Yoshihiro Nakane, Hiroshi Nakashima, Yukio Sakamoto, Atsushi Tamii, Kichiji Hatanaka, Takashi Nakamur
    Progress in Nuclear Science and Technology 4 327 - 331 The Atomic Energy Society of Japan 2014年 [査読有り][通常論文]
  • Tetsuro Matsumoto, Akihiko Masuda, Jun Nishiyama, Hideki Harano, Hiroshi Iwase, Yosuke Iwamoto, Masayuki Hagiwara, Daiki Satoh, Hiroshi Yashima, Yoshihiro Nakane, Hiroshi Nakashima, Yukio Sakamoto, Christian Pioch, Vladimir Mares, Atsushi Tamii, Kichiji Hatanaka, Takashi Nakamur
    Progress in Nuclear Science and Technology 4 332 - 336 The Atomic Energy Society of Japan 2014年 [査読有り][通常論文]
  • Hiroshi Nakashima, Nikolai V. Mokhov, Yoshimi Kasugai, Norihiro Matsuda, Yosuke Iwamoto, Yukio Sakamoto, David Boehnlein, Anthony Leveling, Kamran Vaziri, Richard Coleman, Douglas Jensen, Erik Ramberg, Aria Soha, Toshiya Sanami, Hiroshi Matsumura, Masayuki Hagiwara, Akihiro Toyoda, Hiroshi Iwase, Hideo Hirayama, Takashi Nakamura, Shun Sekimoto, Hiroshi Yashima, Tsuyoshi Kajimoto, Nobuhiro Shigyo, Kenji Ishibashi, Noriaki Nakao, Norikazu Kinoshita, Koji Oishi, Hee-Seock Lee, Koji Niita
    Progress in Nuclear Science and Technology 4 191 - 196 2014年 [査読有り][通常論文]
  • Toshiya Sanami, Yosuke Iwamoto, Tsuyoshi Kajimoto, Nobuhiro Shigyo, Masayuki Hagiwara, Hee-Seock Lee, Erik Ramberg, Aria Soha, Douglas Jensen, Anthony Leveling, Nikolai Mokhov, David Boehnlein, Kamran Vaziri, Kenji Ishibashi, Yukio Sakamoto, Hiroshi Nakashima
    Progress in Nuclear Science and Technology 4 341 - 344 2014年 [査読有り][通常論文]
  • Tatsuhiko Sato, Koji Niita, Norihiro Matsuda, Shintaro Hashimoto, Yosuke Iwamoto, Takuya Furuta, Shusaku Noda, Tatsuhiko Ogawa, Hiroshi Iwase, Hiroshi Nakashima, Tokio Fukahori, Keisuke Okumura, Tetsuya Kai, Satoshi Chiba, Lembit Sihver
    SNA + MC 2013 - JOINT INTERNATIONAL CONFERENCE ON SUPERCOMPUTING IN NUCLEAR APPLICATIONS + MONTE CARLO 2014年 [査読有り][通常論文]
     
    A general purpose Monte Carlo Particle and Heavy Ion Transport code System, PHITS, is being developed through the collaboration of several institutes in Japan and Europe. The Japan Atomic Energy Agency is responsible for managing the entire project. PHITS can deal with the transport of nearly all particles, including neutrons, protons, heavy ions, photons, and electrons, over wide energy ranges using various nuclear reaction models and data libraries. It is written in Fortran language and can be executed on almost all computers. All components of PHITS such as its source, executable and data-library files are assembled in one package and then distributed to many countries via the Research organization for Information Science and Technology, the Data Bank of the Organization for Economic Co-operation and Development's Nuclear Energy Agency, and the Radiation Safety Information Computational Center. More than 1,000 researchers have been registered as PHITS users, and they apply the code to various research and development fields such as nuclear technology, accelerator design, medical physics, and cosmic-ray research. This paper briefly summarizes the physics models implemented in PHITS, and introduces some important functions useful for specific applications, such as an event generator mode and beam transport functions.
  • Tatsuhiko Sato, Koji Niita, Norihiro Matsuda, Shintaro Hashimoto, Yosuke Iwamoto, Shusaku Noda, Tatsuhiko Ogawa, Hiroshi Iwase, Hiroshi Nakashima, Tokio Fukahori, Keisuke Okumura, Tetsuya Kai, Satoshi Chiba, Takuya Furuta, Lembit Sihver
    JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY 50 9 913 - 923 2013年09月 [査読有り][通常論文]
     
    An upgraded version of the Particle and Heavy Ion Transport code System, PHITS2.52, was developed and released to the public. The new version has been greatly improved from the previously released version, PHITS2.24, in terms of not only the code itself but also the contents of its package, such as the attached data libraries. In the new version, a higher accuracy of simulation was achieved by implementing several latest nuclear reaction models. The reliability of the simulation was improved by modifying both the algorithms for the electron-, positron-, and photon-transport simulations and the procedure for calculating the statistical uncertainties of the tally results. Estimation of the time evolution of radioactivity became feasible by incorporating the activation calculation program DCHAIN-SP into the new package. The efficiency of the simulation was also improved as a result of the implementation of shared-memory parallelization and the optimization of several time-consuming algorithms. Furthermore, a number of new user-support tools and functions that help users to intuitively and effectively perform PHITS simulations were developed and incorporated. Due to these improvements, PHITS is now a more powerful tool for particle transport simulation applicable to various research and development fields, such as nuclear technology, accelerator design, medical physics, and cosmic-ray research.
  • Vladimir Mares, Christian Pioch, Werner Ruehm, Hiroshi Iwase, Yosuke Iwamoto, Masayuki Hagiwara, Daiki Satoh, Hiroshi Yashima, Toshiro Itoga, Tatsuhiko Sato, Yoshihiro Nakane, Hiroshi Nakashima, Yukio Sakamoto, Tetsuro Matsumoto, Akihiko Masuda, Hideki Harano, Jun Nishiyama, Christian Theis, Eduard Feldbaumer, Lukas Jaegerhofer, Atsushi Tamii, Kichiji Hatanaka, Takashi Nakamura
    IEEE TRANSACTIONS ON NUCLEAR SCIENCE 60 1 299 - 304 2013年02月 [査読有り][通常論文]
     
    This paper describes the results of neutron spectrometry and dose measurements using a Bonner Sphere Spectrometer (BSS) at the ring cyclotron facility of the Research Center for Nuclear Physics (RCNP), Osaka University, Japan. Quasi-monoenergetic neutron fields were generated using the Li-7(p, n)Be-7 reaction and 246 and 389 MeV protons. Neutrons produced at 0 degrees and 30 degrees emission angles were extracted into a time-of-flight (TOF) tunnel, and the energy spectra were measured at a distance of 35 m from the target. To deduce the corresponding neutron spectra from thermal to the nominal maximum energy, the BSS data were unfolded using the MSANDB code and response functions were calculated by Monte Carlo (MC) methods. These spectra are compared to spectral measurements using NE213 organic liquid scintillators applying the TOF method. The results are discussed in terms of ambient dose equivalent H*(10) and compared with the readings of other instruments operated during the experiment
  • L. Sihver, T. Sato, K. Niita, N. Matsuda, Y. Iwamoto, S. Hashimoto, H. Iwase, H. Nakashima, S. Chiba, S. Chiba
    CERN-Proceedings 497 - 502 2013年01月01日 [査読無し][通常論文]
     
    PHITS is a 3-dimensional general-purpose Monte Carlo code, which can transport of all varieties of hadrons and heavy ions with energies up to around 100 GeV/nucleon. To be able to estimate the biological damage from neutrons with PUTTS, a feature has been included to treat low energy neutron collisions as "events" which means that the energy and momentum is conserved in each event and makes it possible to extract the kinetic energy distributions of all the residual nuclei without using any local approximation. To estimate the direct biological effects of radiation, mathematical functions, for calculating the microdosmetric probability densities in macroscopic material, have been incorporated in PUTTS. This makes it possible to instantaneously calculate the probability densities of lineal and specific energies around the trajectories of high energetic charged particle tracks. A method for estimating the biological dose has also been established by using the improved PUTTS coupled to a microdosimetric kinetic model.
  • Daiki Satoh, Yoshikazu Maeda, Yuji Tameshige, Hiroshi Nakashima, Tokushi Shibata, Akira Endo, Shuichi Tsuda, Makoto Sasaki, Motokazu Maekawa, Yasuhiro Shimizu, Masaharu Yamazaki, Tadashi Katayose, Koji Niita
    JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY 49 11 1097 - 1109 2012年11月 [査読有り][通常論文]
     
    At the Fukui Prefectural Hospital Proton Therapy Center, neutron doses behind the concrete shields and at the maze were measured with three types of radiation monitors (DARWIN, Wendi-2, and a rem meter) along with solid-state nuclear track detectors. The measured data were compared with estimations of analytical models and the Monte Carlo code, Particle and Heavy-Ion Transport code System (PHITS). The analytical model, using the parameters employed in the shielding design of the facility, gave considerably larger values than the measured data. This means that the facility was designed with a sufficient margin of safety. The results calculated by PHITS were less than those of the analytical model and were about three times larger than the measured data. From a perspective that seeks conservative estimation with less margin, the Monte Carlo simulation is a good tool for shielding design of accelerator-based proton treatment facilities.
  • YASHIMA Hiroshi, KASUGAI Yoshimi, MATSUDA Norihiro, MATSUMURA Hiroshi, SEKIMOTO Shun, TOYODA Akihiro, IWASE Hiroshi, MOKHOV Nikolai, LEVELING Anthony, BOEHNLEIN David, VAZIRI Kamran, OISHI Koji, NAKASHIMA Hiroshi, SAKAMOTO Yukio
    Prog Nucl Sci Technol (Web) 3 WEB ONLY 40-43  2012年10月 [査読有り][通常論文]
  • Colloid Formation Rates of Radionuclides Produced from Cu Foils in Water Bombarded with 120-GeV Protons
    MATSUMURA Hiroshi, SEKIMOTO Shun, YASHIMA Hiroshi, TOYODA Akihiro, KASUGAI Yoshimi, MATSUDA Norihiro, OISHI Koji, BESSHO Kotaro, SAKAMOTO Yukio, NAKASHIMA Hiroshi, BOEHNLEIN David, LAUTENSCHLAGER Gary, LEVELING Anthony, MOKHOV Nikolai, VAZIRI Kamran
    Prog Nucl Sci Technol (Web) 3 WEB ONLY 127-130  2012年10月 [査読有り][通常論文]
  • T. Sanami, Y. Iwamoto, T. Kajimoto, N. Shigyo, M. Hagiwara, H. S. Lee, E. Ramberg, R. Coleman, A. Soha, D. Jensen, A. Leveling, N. V. Mokhov, D. Boehnlein, K. Vaziri, K. Ishibashi, Y. Sakamoto, H. Nakashima
    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS 274 26 - 35 2012年03月 [査読有り][通常論文]
     
    A methodology for the time-of-flight measurement of the neutron energy spectrum for a high-energy proton-beam-induced reaction was established at the Fermilab Test Beam Facility of the Fermi National Accelerator Laboratory. The 120-GeV proton beam with 3 x 10(5) protons/spill was prepared for event-by-event counting of incident protons and emitted neutrons for time-of-flight energy determination. An NE213 organic liquid scintillator (12.7 cm in diameter by 12.7 cm in length) was employed with a veto plastic scintillator and a pulse-shape discrimination technique to identify neutrons. Raw waveforms of NE213, veto and beam detectors were recorded to discriminate the effects of multi-proton beam events by considering different time windows. The neutron energy spectrum ranging from 10 to 800 MeV was obtained for a 60-cm-long copper target at 90 degrees with respect to the beam axis. The obtained spectrum was consistent with that deduced employing the conventional unfolding technique as well as that obtained in a 40-GeV/c thin-target experiment. (C) 2011 Elsevier B.V. All rights reserved.
  • Nobuhiro Shigyo, Toshiya Sanami, Tsuyoshi Kajimoto, Yosuke Iwamoto, Masayuki Hagiwara, Kiwamu Saito, Kenji Ishibashi, Hiroshi Nakashima, Yukio Sakamoto, Hee-Seock Lee, Erik Ramberg, Aria A. Meyhoefer, Rick Coleman, Doug Jensen, Anthony F. Leveling, David J. Boehnlein, Nikolai V. Mokho
    2012年02月08日 [査読無し][通常論文]
     
    Neutron energy spectrum from 120 GeV protons on a thick copper target was
    measured at the Meson Test Beam Facility (MTBF) at Fermi National Accelerator
    Laboratory. The data allows for evaluation of neutron production process
    implemented in theoretical simulation codes. It also helps exploring the
    reasons for some disagreement between calculation results and shielding
    benchmark data taken at high energy accelerator facilities, since it is
    evaluated separately from neutron transport. The experiment was carried out
    using a 120 GeV proton beam of 3E5 protons/spill. Since the spill duration was
    4 seconds, proton-induced events were counted pulse by pulse. The intensity was
    maintained using diffusers and collimators installed in the beam line to MTBF.
    The protons hit a copper block target the size of which is 5cm x 5cm x 60 cm
    long. The neutrons produced in the target were measured using NE213 liquid
    scintillator detectors, placed about 5.5 m away from the target at 30^{\circ}
    and 5 m 90^{\circ} with respect to the proton beam axis. The neutron energy was
    determined by time-of-flight technique using timing difference between the
    NE213 and a plastic scintillator located just before the target. Neutron
    detection efficiency of NE213 was determined on basis of experimental data from
    the high energy neutron beam line at Los Alamos National Laboratory. The
    neutron spectrum was compared with the results of multi-particle transport
    codes to validate the implemented theoretical models. The apparatus would be
    applied to future measurements to obtain a systematic data set for secondary
    particle production on various target materials.
  • Akihiko Masuda, Tetsuro Matsumoto, Hideki Harano, Jun Nishiyama, Yosuke Iwamoto, Masayuki Hagiwara, Daiki Satoh, Hiroshi Iwase, Hiroshi Yashima, Takashi Nakamura, Tatsuhiko Sato, Toshiro Itoga, Yoshihiro Nakane, Hiroshi Nakashima, Yukio Sakamoto, Christian Theis, Eduard Feldbaumer, Lukas Jaegerhofer, Christian Pioch, Vladimir Mares, Atsushi Tamii, Kichiji Hatanaka
    IEEE TRANSACTIONS ON NUCLEAR SCIENCE 59 1 161 - 166 2012年02月 [査読有り][通常論文]
     
    Response measurements of a Bonner sphere spectrometer (BSS) were performed for high-energy neutrons up to 400 MeV in quasi-monoenergetic neutron fields at the Research Center for Nuclear Physics (RCNP), Osaka University. The quasi-monoenergetic neutron field was generated by a reaction with the resulting spectra consisting of a monoenergetic high-energy peak followed by an unwanted continuum tail down to the low-energy region. Two-angle differential measurements for a variety of Bonner spheres were performed to obtain monoenergetic responses by subtracting the tail contributions. Discussions were made on data analysis for tail subtraction. While each Bonner sphere had a different energy response, good agreements were seen in the responses between the MCNPX calculations and the measurements with a suitable subtraction. Response calculations were also made for the whole spectra obtained by unfolding the measured BSS data, with results that reproduce well the measured responses.
  • Fitting Method for Spectrum Deduction in High-Energy Neutron Field Induced by GeV-Protons Using Experimental Reaction-Rate Data
    Y. Kasugai, N. Matsuda, Y. Sakamoto, H. Nakashima, H. Yashima, H. Matsumura, H. Iwase, H. Hirayama, N. Mokhov, A. Leveling, D. Boehnlein, K. Vaziri, G. Lauten, K. Oishi, T. Nakamura
    Journal of ASTM International 9 4 JAI104074  2012年 [査読有り][通常論文]
  • Y. IWAMOTO, T. SANAMI, T. KAJIMOTO, N. SHIGYO, M. HAGIWARA, H.S. LEE, A. SOHA, E.RAMBERG, R.COLEMAN, D.JENSEN, A. LEVELING, N.V.MOKHOV, D.BOREHEN, K. VAZLI, Y. SAKAMOTO, H. NAKASHIMA
    Progress in Nuclear Science and Technology Volume 3 65 - 68 2012年 [査読有り][通常論文]
  • C. Pioch, V. Mares, W. Ruehm, H. Iwase, Y. Iwamoto, T. Sato, M. Hagiwara, D. Satoh, Y. Nakane, H. Nakashima, Y. Sakamoto, H. Yashima, T. Matsumoto, A. Masuda, J. Nishiyama, T. Itoga, C. Theis, E. Feldbaumer, L. Jaegerhofer, A. Tamii, K. Hatanaka, T. Nakamura
    JOURNAL OF INSTRUMENTATION 6 2011年10月 [査読無し][通常論文]
     
    This paper describes the results of calibration measurements for a Bonner sphere spectrometer (BSS) with He-3 proportional counter performed in quasi-monoenergetic neutron fields at the Research Center for Nuclear Physics (RCNP) at the University of Osaka, Japan. Using 246 MeV and 389 MeV proton beams, neutron fields with nominal peak energies of 244 MeV and 387 MeV were generated via Li-7(p,n)Be-7 reactions. At high energies, the neutron spectra were measured by means of the time-of-flight (TOF) method. The low-energy part of the neutron spectra were determined by BSS measurements down to thermal energies using the MSANDB unfolding code and three different sets of response functions. These were obtained by means of Monte Carlo (MC) calculations including various codes and intra-nuclear cascade (INC) models. Unfolded BSS fluence rates were additionally confirmed by GEANT4 calculations. For calibration of the BSS, measured count rates were corrected for low-energy contributions and compared with count rates calculated using TOF data and various response functions. In addition, measured response values were compared with mono-energetic response calculations, and best agreement was found with GEANT4 results using the Bertini INC model.
  • T. Sato, K. Niita, V. A. Shurshakov, E. N. Yarmanova, I. V. Nikolaev, H. Iwase, L. Sihver, D. Mancusi, A. Endo, N. Matsuda, Y. Iwamoto, H. Nakashima, Y. Sakamoto, H. Yasuda, M. Takada, T. Nakamura
    COSMIC RESEARCH 49 4 319 - 324 2011年08月 [査読無し][通常論文]
     
    The dose reduction rates brought about by the installation of additional water shielding in a spacecraft are calculated in the paper using the particles and heavy ion transport code system PHITS, which can deal with transport of all kinds of hadrons and heavy ions with energies up to 100 GeV/n in three-dimensional phase spaces. In the PHITS simulation, an imaginary spacecraft was irradiated isotropically by cosmic rays with charges up to 28 and energies up to 100 GeV/n, and the dose reduction rates due to water shielding were evaluated for 5 types of doses: the dose equivalents obtained from the LET and linear energy spectra, the dose equivalents to skin and red bone marrow, and the effective dose equivalent. The results of the simulation indicate that the dose reduction rates differ according to the type of dose evaluated. For example, 5 g/cm(2) water shielding reduces the effective dose equivalent and the LET dose equivalent by approximately 14% and 32%, respectively. Such degrees of dose reduction can be regarded to make water shielding worth the efforts required to install it.
  • Koji Niita, Y. Iwamoto, T. Sato, N. Matsuda, Y. Sakamoto, H. Nakashima, H. Iwase, L. Shiver
    JOURNAL OF THE KOREAN PHYSICAL SOCIETY 59 2 827 - 832 2011年08月 [査読無し][通常論文]
     
    We present the event generator rnodels incorporated in the particle and heavy ion transport code system PHITS. For the high energy nuclear reactions, we discuss the QMD model and the INC model followed by the statistical decay model. For low energy neutron transport by using the nuclear data, we propose a new model, in which we combine the evaluated nuclear data and the reaction models so as to describe all ejectiles of collision keeping the energy and momentum conservation. By this new model, we can estimate new quantities which are related to the higher order correlations beyond one-body observable, for an example, the deposit energy distribution in a cell, which cannot be obtained by the transport calculation based on the Boltzmann equation with the evaluated nuclear data.
  • Koji Niita, H. Iwase, Y. Iwamoto, T. Sato, N. Matsuda, Y. Sakamoto, H. Nakashima, L. Sihver
    JOURNAL OF THE KOREAN PHYSICAL SOCIETY 59 2 1640 - 1643 2011年08月 [査読無し][通常論文]
     
    PHITS, a general-purpose Particle and Heavy Ion Transport code System, has been used for various research fields such as radiation science, accelerator and its shielding design, space research, medical application and material research. In this paper, we present an overview of the PHITS code, particularly the heavy ion reaction model included in the code and the capability of the transport of charged particles and heavy ions under magnetic field and discuss the applicability of the PHITS code to heavy ion accelerator facilities by showing some examples of the analysis.
  • Hiroshi Matsumura, Norikazu Kinoshita, Hiroshi Iwase, Akihiro Toyoda, Yoshimi Kasugai, Norihiro Matsuda, Yukio Sakamoto, Hiroshi Nakashima, Hiroshi Yashima, Nikolai Mokhov, Anthony Leveling, David Boehnlein, Kamran Vazili, Gary Lautenschlager, Wayne Schmitt, Koji Oishi
    JOURNAL OF THE KOREAN PHYSICAL SOCIETY 59 2 2059 - 2062 2011年08月 [査読有り][通常論文]
     
    In an antiproton production (Pbar) target station of the Fermi National Accelerator Laboratory (FNAL), the secondary particles produced by bombarding a target with 120-GeV protons are shielded by a thick iron shield. In order to obtain experimental data on high-energy neutron transport at more than 100-GeV-proton accelerator facilities, we indirectly measured more than 100-MeV neutrons at the outside of the iron shield at an angle of 50 degrees in the Pbar target station. The measurement was performed by using the Au activation method coupled with a low-background gamma-ray counting system. As an indicator for the neutron flux, we determined the production rates of 8 spoliation nuclides (Au-196, Pt-188, Ir-189, Os-185, Hf-175, Lu-173, Lu-171, and Yb-169) in the Au activation detector. The measured production rates were compared with the theoretical production rates calculated using PHITS. We proved that the Au activation method can serve as a powerful tool for indirect measurements of more than100-MeV neutrons that play a vital role in neutron transport. These results will be important for clarifying the problems in theoretical calculations of high-energy neutron transport.
  • N. Matsuda, Y. Kasugai, Y. Sakamoto, H. Nakashima, H. Matsumura, H. Iwase, N. Kinoshita, H. Hirayama, H. Yashima, N. Mokhov, A. Levering, D. Boehnlein, K. Vazili, L. Gary, S. Wayne, K. Oishi, T. Nakamura, K. Ishibashi, K. Niita
    JOURNAL OF THE KOREAN PHYSICAL SOCIETY 59 2 2055 - 2058 2011年08月 [査読無し][通常論文]
     
    Neutron spectra in high-energy region between 1 and 100 MeV in the shield configuration of the anti-proton target station and a 120-GeV proton beam at Fermi National Accelerator Laboratory (Fermi lab) were determined using the reaction rate data obtained with the multi-foil activation method. Two kinds of methods were employed for the determination of neutron spectra: one is the fitting method which is newly developed in this work, another is the unfolding method with SAND-II code. The calculations were performed using the PHITS. From the comparison between the calculated and experimental neutron spectra, it concluded that the PHITS can be used for shielding design of highenergy proton accelerators.
  • Y. Watanabe, K. Kosako, S. Kunieda, S. Chiba, R. Fujimoto, H. Harada, M. Kawai, F. Maekawa, T. Murata, H. Nakashima, K. Nitta, N. Shigyo, S. Shimakawa, N. Yamano, T. Fukahori
    JOURNAL OF THE KOREAN PHYSICAL SOCIETY 59 2 1040 - 1045 2011年08月 [査読無し][通常論文]
     
    The present status of the JENDL high-energy file is reported. The recent version (referred to as JENDL/HE-2007) contains neutron and proton cross section data for energies up to 3 GeV for 107 nuclides over the wide mass range from H to Am. The newly evaluated data for 41 nuclides have been added to the first version (JENDL/HE-2004) along with some revisions. The JENDL/HE-2007 includes neutron total cross sections, nucleon elastic scattering cross sections and angular distributions, nonelastic cross sections, production cross sections and double-differential cross sections of secondary light particles (n, p, d, t, (3)He, alpha, and pi) and gamma-rays, isotope production cross sections, and fission cross sections in the ENDF-6 format. The evaluations were performed on the basis of experimental data, nuclear model calculations, and systematics based on measurements. The evaluated cross sections are compared with available experimental data and the other evaluations. Some results of benchmark tests with MCNPX codes are shown.
  • M. Hagiwara, T. Sanami, K. Masumoto, Y. Iwamoto, N. Matsuda, Y. Sakamoto, Y. Nakane, H. Nakashima, Y. Uwamino
    JOURNAL OF THE KOREAN PHYSICAL SOCIETY 59 2 2035 - 2038 2011年08月 [査読有り][通常論文]
     
    Nuclear data on proton-induced neutron and gamma-ray production in the energy range from 10 to 20 MeV is important to estimate the shield design and activation of low-energy cyclotron facilities for medical use such as production of radiopharmaceuticals in positron emission tomography (PET). We have measured double-differential thick target yields (TTYs) of neutrons and gamma-rays from a O-18-enriched water ((H2O)-O-18) target induced by 18 MeV protons in order to estimate leakage radiations from a cyclotron and the neutron-induced activation in the production process of the F-18-tagged fluorodeoxyglucose (FDG) which is a common radiopharmaceuticals for PET. Neutrons and gamma-rays were measured with 5.08 cm-diameter x 5.08 cm-long NE213 scintillators for eight laboratory angles between 15- and 150-degrees. After applying a neutron-gamma-ray event separation using the pulse-shape-discrimination (PSD) technique the neutron and gamma-ray events were analyzed by a time-of-flight (TOF) technique and an unfolding technique, respectively. The measured TTYs were compared with TENDL-2009 data library and the physical model calculations with MCNPX and PHITS. The calculated TTYs roughly agree with the measured data.
  • Y. Kasugai, N. Matsuda, Y. Iwamoto, Y. Sakamoto, H. Nakashima, H. Matsumura, N. Kinoshita, H. Iwase, T. Sanami, M. Hagiwara, H. Hirayama, H. Yashima, N. Sigyo, H. Arakawa, K. Ishibashi, N. Mokhov, A. Leveling, D. Boehnlein, K. Vaziri, G. Lauten, S. Wayne, V. Cupps, B. Kershisnik, S. Benesch, T. Nakamura, K. Oishi, K. Niita
    JOURNAL OF THE KOREAN PHYSICAL SOCIETY 59 2 2063 - 2066 2011年08月 [査読有り][通常論文]
     
    Shielding experiments were started on 2007 using high-energy proton accelerator at Fermi National Accelerator Laboratory (Fermilab) under the collaborative study program of JASMIN: Japanese and American Study of Muon Interaction and Neutron Detection. In this series of papers entitled "Shielding experiments under JASMIN collaboration at Fermilab", the part of the results regarding neutron detection has been reported. Tins paper, as a first paper of the series, overview of the research activities are described, and experimental results on high-energy neutron transportation are presented in a viewpoint of neutron attenuation in steel shield and applicability of Moyer's model. In addition, deductions of a neutron spectrum in wide energy range between 1 eV and 100 MeV by means of the hybrid method using the current-readout Bonner sphere together with foil-activation technique are presented.
  • Yosuke Iwamoto, Daiki Satoh, Yoshihiro Nakane, Hiroshi Nakashima, Akira Endo, Yukio Sakamoto, Masayuki Hagiwara, Hiroshi Iwase, Hiroshi Yashima, Atsushi Tamii, Kichiji Hatanaka
    JOURNAL OF THE KOREAN PHYSICAL SOCIETY 59 2 1753 - 1756 2011年08月 [査読有り][通常論文]
     
    The neutron energy spectra of carbon, iron, and gold targets with 140 MeV protons at 180 degrees were measured at the RCNP cyclotron facility using the time-of-flight technique. The results were compared with results calculated using the evaluated nuclear data file (the LA150 library) and the intranuclear cascade models (JAM and JQMD) implemented in the PHITS code. The results using LA150 and JQMD generally agreed with the experimental data except for the carbon target, but the JAM could not reproduce high-energy neutrons above 10 MeV because of the lack of pre-equilibrium reactions and the reflection and refraction of a nucleon with other nucleons in the nucleus, for example. Experimental neutron energy spectra at 180 degrees were composed of two evaporation Maxwellian-type components (in two neutron energy regions of 1 - 4 MeV and 4 - 10 MeV) and a preequilibrium (in the neutron energy region above 10 MeV) Maxwellian-type component All experimental spectra were fitted well by the sum of three Maxwellian-type equations across the entire energy region of the neutrons.
  • Yashima, Hiroshi, Matsuda, Norihiro, Kasugai, Yoshimi, Nakashima, Hiroshi, Sakamoto, Yukio, Matsumura, Hiroshi, Iwase, Hiroshi, Kinoshita, Norikazu
    JOURNAL OF THE KOREAN PHYSICAL SOCIETY 59 2 2051 - 2054 2011年08月 [査読有り][通常論文]
     
    The JASMIN Collaboration has performed an experiment to conduct measurements of nuclear reaction rates around the anti-proton production (Pbar) target at the Fermi National Accelerator Laboratory (FNAL). At the Pbar target station, the target, consisting an Inconel 600 cylinder, was irradiated by a 120 GeV/c proton beam from the FNAL Main Injector. The beam intensity was 3.6 x 10(12) protons per second. Samples of Al, Nb, Cu, and Au were placed near the target to investigate the spatial and energy distribution of secondary particles emitted from it. After irradiation, the induced activities of the samples were measured by studying their gamma ray spectra using HPGe detectors. The production rates of 30 nuclides induced in Al, Nb, Cu, Au samples were obtained. These rates increase for samples placed in a forward (small angle) position relative to the target. The angular dependence of these reaction rates becomes larger for increasing threshold energy. These experimental results are compared with Monte Carlo calculations. The calculated results generally agree with the experimental results to within a factor of 2 to 3.
  • Yosuke Iwamoto, Masayuki Hagiwara, Daiki Satoh, Hiroshi Iwase, Hiroshi Yashima, Toshiro Itoga, Tatsuhiko Sato, Yoshihiro Nakane, Hiroshi Nakashima, Yukio Sakamoto, Tetsuro Matsumoto, Akihiko Masuda, Jun Nishiyama, Atsushi Tamii, Kichiji Hatanaka, C. Theis, E. Feldbaumer, L. Jaegerhofer, C. Pioch, V. Mares, Takashi Nakamura
    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 629 1 43 - 49 2011年02月 [査読有り][通常論文]
     
    The authors measured the neutron energy spectra of a quasi-monoenergetic Li-7(p,n) neutron source with 246 and 389 MeV protons set at seven angles (0 degrees, 2.5 degrees, 5 degrees, 10 degrees, 15 degrees, 20 degrees and 30 degrees), using a time-of-flight (TOF) method employing organic scintillators NE213 at the Research Center for Nuclear Physics (RCNP) of Osaka University. The energy spectra of the source neutrons were precisely deduced down to 2 MeV at 0 degrees and 10 MeV at other angles. The cross-sections of the peak neutron production reaction at 0 degrees were on the 35-40 mb line of other experimental data, and the peak neutron angular distribution agreed well with the Taddeucci formula. Neutron energy spectra below 100 MeV at all angles were comparable, but the shapes of the continuum above 150 MeV changed considerably with the angle. In order to consider the correction required to derive the response in the peak region from the measured total response for high-energy neutron monitors such as DARWIN and Wendi-2, the authors showed the subtractions of H* (10) obtained at larger angles (10 degrees, 15 degrees, 20 degrees and 30 degrees) from the 0 degrees data in the continuum part for the 246 and 389 MeV Li-7(p,n) reactions. It was found that subtracting the dose equivalent at about 20 degrees from the 0 degrees data almost eliminates the continuum component. This method has potential to eliminate problems associated with continuum correction for high-energy neutron monitors. (C) 2010 Elsevier B.V. All rights reserved.
  • Applications of the PHITS code to space researches: estimation of dose reduction rate due to water shielding in front of Russian crew cabin
    Tatsuhiko Sato, Koji Niita, V. A. Shurshakov, B.E. Kalyaev, E.N. Yarmanova, I.V. Nikolaev, Hiroshi Iwase, Lembit Sihver, D. Mancusi, Akira Endo, N. Matsuda, Yousuke Iwamoto, Hiroshi Nakashima, Yukio Sakamoto, Hiroshi Yasuda, Masashi Takada, Takashi Nak
    Cosmic Research 49 319 - 324 2011年 [査読有り][通常論文]
  • Test Measurement of Neutron Energy Spectra on Thin Targets Bombarded with 13 MeV/nucleon 20Ne
    Y. Iwamoto, M. Hagiwara, N. Matsuda, T. Sanami, Y. Sakamoto, H. Nakashima, K. Mizuhashi
    JAEA-Review 2011-043 43 148  2011年 [査読有り][通常論文]
  • Systematic Measurement of Neutron and Gamma-ray from Thick Targets Bombarded with 12 and 18 MeV Protons
    M. Hagiwara, T. Sanami, Y. Iwamoto, N. Matsuda, Y. Sakamoto, Y. Nakane, H. Nakashima, K. Masumoto, Y. Uwamino, K. Mizuhashi
    JAEA-Review 2011-043 43 149  2011年 [査読有り][通常論文]
  • Yosuke IWAMOTO, Koji NIITA, Tatsuhiko SATO, Norihiro MATSUDA, Hiroshi IWASE, Hiroshi NAKASHIMA, Yukio SAKAMOT
    Progress in Nuclear Science and Technology 2 0 931  The Atomic Energy Society of Japan 2011年 [査読有り][通常論文]
  • Norihiro MATSUDA, Yosuke IWAMOTO, Hiroshi IWASE, Yukio SAKAMOTO, Hiroshi NAKASHIMA, Koji NIIT
    Progress in Nuclear Science and Technology 2 0 927  The Atomic Energy Society of Japan 2011年 [査読有り][通常論文]
  • Lukas JÃ, GERHOFER, Eduard FELDBAUMER, Doris FORKEL-WIRTH, Chris THEIS, Helmut VINCKE, Yosuke IWAMOTO, Masayuki HAGIWARA, Daiki SATOH, Hiroshi IWASE, Hiroshi YASHIMA, Tetsuo MATSUMOTO, Akihiko MASUDA, Jun NISHIYAMA, Takashi NAKAMURA, Tatsuhiko SATO, Yoshihiro NAKANE, Hiroshi NAKASHIMA, Yukio SAKAMOTO, Atsushi TAMII, Kichiji HATANAKA
    Progress in Nuclear Science and Technology 2 0 258  The Atomic Energy Society of Japan 2011年 [査読有り][通常論文]
  • Koji NIITA, Hiroshi IWASE, Tatsuhiko SATO, Yosuke IWAMOTO, Norihiro MATSUDA, Yukio SAKAMOTO, Hiroshi NAKASHIMA, Davide MANCUSI, Lembit SIHVE
    Progress in Nuclear Science and Technology 1 0 1  The Atomic Energy Society of Japan 2011年 [査読有り][通常論文]
  • Shielding Experiments at High Energy Accelerators of Fermilab(II) - Spatial distribution measurement of reaction rate behind the shield and its application for Moyer model -
    H. Yashima, Y. Kasugai, N. Matsuda, H. Matsumura, H. Iwase, N. Kinoshita, N. Mokhov, A. Leveling, D. Boehnlein, K. Vazili, L. Gary, S. Wayne, T. Nakamura, K. Oishi, H. Hirayama, K. Ishibashi, H. Nakashima, Y. Sakamoto, members of JASMIN collaboration
    Progress in Nuclear Science and Technology 1 48 - 51 2011年 [査読無し][通常論文]
  • Shielding experiments at high energy accelerators of Fermilab(IV) -Calculation analyses,
    N.Matsuda, Y.Kasugai, H.Matsumura, H.Yashima, H.Iwase, N.Kinoshita, T.Sanami, N.Mokhov, A.Leveling, D.Boehnlein, K.Vazili, L.Gary, S.Wayne, T.Nakamura, K.Oishi, H.Hirayama, K.Ishibashi, K.Niita, Y.Sakamoto, H.Nakashima
    Progress in Nuclear Science and Technology 1 57 - 60 2011年 [査読有り][通常論文]
  • Shielding experiments at high energy accelerators of Fermilab(III) -Neutron spectrum measurements in intense pulsed neutron fields of the 120 GeV proton facility using a current bonner sphere technique,
    M.Hagiwara, T.Sanami, Y.Iwamoto, H.Arakawa, N.Shigyo, N.Mokhov, A.Leveling, D.Boehnlein, K.Vazili, T.Nakamura, K.Oishi, H.Hirayama, H.Nakashima, Y.Sakamoto
    Progress in Nuclear Science and Technology 1 52 - 56 2011年 [査読有り][通常論文]
  • Shielding experiments at high energy accelerators of Fermilab(I) -Dose rate around high intensity muon beam,
    T.Sanami, Y.Iwamoto, N.Shigyo, M.Hagiwara, H.S.Lee, A.Leveling, K.Vazili, D.Boehnlein, N.Mokhov, Y.Sakamoto, H.Nakashima
    Progress in Nuclear Science and Technology 1 44 - 47 2011年 [査読有り][通常論文]
  • Experimental Method for Neutron Elastic Scattering Cross-Section Measurement in Intermediate Energy Region at RCNP
    Daiki SATOH, Yosuke IWAMOTO, Masayuki HAGIWARA, Hiroshi IWASE, Hiroshi YASHIMA, Toshiya SANAMI, Tatsuhiko SATO, Akira ENDO, Yukio SAKAMOTO, Yoshihiro NAKANE, Hiroshi NAKASHIMA, Takashi NAKAMURA, Atsushi TAMII, Kichiji HATANAKA
    Progress in NUCLEAR SCIENCE and TECHNOLOGY 1 20 - 23 2011年 [査読有り][通常論文]
  • Akihiko Masuda, Tetsuro Matsumoto, Hideki Harano, Jun Nishiyama, Yosuke Iwamoto, Masayuki Hagiwara, Daiki Satoh, Hiroshi Iwase, Hiroshi Yashima, Takashi Nakamura, Tatsuhiko Sato, Toshiro Itoga, Yoshihiro Nakane, Hiroshi Nakashima, Yukio Sakamoto, Christian Theis, Eduard Feldbaumer, Lukas Jaegerhofer, Christian Picoh, Vladimir Mares, Atsushi Tamii, Kichiji Hatanaka
    IEEE Nuclear Science Symposium Conference Record 986 - 990 2010年12月01日 [査読無し][通常論文]
     
    Response measurements of a Bonner sphere spectrometer (BSS) were performed for high-energy neutrons up to 400 MeV in quasi-monoenergetic neutron fields at Research Center for Nuclear Physics (RCNP), Osaka University. The quasimonoenergetic neutron field was generated by injecting protons on to the Li target with the spectra consisting of a monoenergetic high-energy peak followed by an unwanted continuum tail down to the low energy region. Two-angle differential measurements were performed to obtain the monoenergetic response by subtracting the tail contribution. Discussions were made on data analysis for tail subtraction. While each Bonner sphere had different energy responses, good agreements were seen in the monoenergetic responses between the MCNPX calculation and the measurement with a suitable subtraction. Response calculations were also conducted for the whole spectra obtained by unfolding the measured BSS data and gave the results reproducing well the measured responses. © 2010 IEEE.
  • D. Satoh, Y. Iwamoto, M. Hagiwara, H. Iwase, H. Yashima, T. Sato, A. Endo, Y. Sakamoto, Y. Nakane, H. Nakashima, T. Nakamura, A. Tamii, K. Hatanaka
    RADIATION MEASUREMENTS 45 10 1159 - 1162 2010年12月 [査読無し][通常論文]
     
    Angular differential neutron elastic scattering cross sections have been measured by using a (7)Li(p,n) quasi-monoenergetic neutron beam. The neutron beam whose peak energy is 134 MeV was incident upon a natural carbon sample, and the scattering neutrons were measured by liquid organic scintillators with the time-of-flight (TOF) technique. The results were compared with the existing experimental data measured by a recoil-proton telescope, and the evaluated nuclear data of JENDL/HE-2007 and ENDF/B-VII.0. (C) 2010 Elsevier Ltd. All rights reserved.
  • Yosuke Iwamoto, Daiki Satoh, Masayuki Hagiwara, Hiroshi Yashima, Yoshihiro Nakane, Atsushi Tamii, Hiroshi Iwase, Akira Endo, Hiroshi Nakashima, Yukio Sakamoto, Kichiji Hatanaka, Koji Niita
    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 620 2-3 484 - 489 2010年08月 [査読有り][通常論文]
     
    The neutron production cross-sections of carbon, iron, and gold targets with 140 MeV protons at 180 degrees were measured at the RCNP cyclotron facility. The time-of-flight technique was used to obtain the neutron energy spectra in the energy range above 1 MeV. The carbon and iron target results were compared with the experimental data from 113 MeV (p,xn) reactions at 150 degrees reported by Meier et al. [7] Our data agreed well with them in spite of different incident energies and angles. Calculations were then performed using different intra-nuclear cascade models (Bertini, ISOBAR, and JQMD) implemented with PHITS code. The results calculated using the ISOBAR and JQMD models roughly agreed with the experimental iron and gold target data, but the Bertini could not reproduce the high-energy neutrons above 10 MeV. (C) 2010 Elsevier B.V. All rights reserved.
  • L. Sihver, T. Sato, K. Gustafsson, D. Mancusi, H. Iwase, K. Niita, H. Nakashima, Y. Sakamoto, Y. Iwamoto, N. Matsuda
    ADVANCES IN SPACE RESEARCH 45 7 892 - 899 2010年04月 [査読無し][通常論文]
     
    PHITS (Particle and Heavy-Ion Transport code System) is a general-purpose three-dimensional Monte Carlo code, developed and maintained by RIST, JAEA and KEK in Japan together with Sihver et al. at Chalmers in Sweden. PHITS can deal with the transports of all varieties of hadrons and heavy ions with energies up to around 100 GeV/nucleon, and in this paper the current status of PHITS is presented. We introduce a relativistically covariant version of JQMD, called R-JQMD, that features an improved ground state initialization algorithm, and we will present the introduction of electron and photon transport in PHITS using EGS5, which have increased the energy region for the photon and energy transport from up to around 3 GeV to up to several hundred GeV depending on the atomic number of the target. We show how the accuracy in dose and fluence calculations can be improved by using tabulated cross sections. Benchmarking of shielding and irradiation effects of high energy protons in different materials relevant for shielding of accelerator facilities is also presented. In particular, we show that PHITS can be used for estimating the dose received by aircrews and personnel in space. In recent years, many countries have issued regulations or recommendations to set annual dose limitations for aircrews. Since estimation of cosmic-ray spectra in the atmosphere is an essential issue for the evaluation of aviation doses, we have calculated these spectra using PHITS. The accuracy of the atmospheric propagation simulation of cosmic-ray performed by PHITS has been well verified by experimental cosmic-ray spectra taken under various conditions. Based on a comprehensive analysis of the simulation results, an analytical model called "PARMA" has been proposed for instantaneously estimating the atmospheric cosmic-ray spectra below the altitude of 20 km. We have also performed preliminary simulations of long-term dose distribution measurements at the ISS performed with the joint ESA-FSA experiment MATROSHKA-R (MTR-R) led by the Russian Federation Institute of Biomedical Problems (IMBP) and the ESA supported experiment MATROSHKA (MTR), led by the German Aerospace Center (DLR). For the purpose of examining the applicability of PHITS to the shielding design in space, the absorbed doses in a tissue equivalent water phantom inside an imaginary space vessel has been estimated for different shielding materials of different thicknesses. The results confirm previous results which indicate that PHITS is a suitable tool when performing shielding design studies of spacecrafts. (C) 2010 COSPAR. Published by Elsevier Ltd. All rights reserved.
  • Akihiko Masuda, Tetsuro Matsumoto, Hideki Harano, Jun Nishiyama, Yosuke Iwamoto, Masayuki Hagiwara, Daiki Satoh, Hiroshi Iwase, Hiroshi Yashima, Takashi Nakamura, Tatsuhiko Sato, Toshiro Itoga, Yoshihiro Nakane, Hiroshi Nakashima, Yukio Sakamoto, Christian Theis, Eduard Feldbaumer, Lukas Jaegerhofer, Christian Picoh, Vladimir Mares, Atsushi Tamii, Kichiji Hatanaka
    2010 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD (NSS/MIC) 986 - 990 2010年 [査読有り][通常論文]
     
    Response measurements of a Bonner sphere spectrometer (BSS) were performed for high-energy neutrons up to 400 MeV in quasi-monoenergetic neutron fields at Research Center for Nuclear Physics (RCNP), Osaka University. The quasi-monoenergetic neutron field was generated by injecting protons on to the Li target with the spectra consisting of a monoenergetic high-energy peak followed by an unwanted continuum tail down to the low energy region. Two-angle differential measurements were performed to obtain the monoenergetic response by subtracting the tail contribution. Discussions were made on data analysis for tail subtraction. While each Bonner sphere had different energy responses, good agreements were seen in the monoenergetic responses between the MCNPX calculation and the measurement with a suitable subtraction. Response calculations were also conducted for the whole spectra obtained by unfolding the measured BSS data and gave the results reproducing well the measured responses.
  • Systematic Measurement of Neutron and Gamma-ray Yields on Thick Targets Bombarded with 18 MeV Protons
    M. Hagiwara, T. Sanami, Y. Iwamoto, N. Matsuda, Y. Sakamoto, Y. Nakane, H. Nakashima, K. Masumoto, Y. Uwamino
    Proceedings of the 2010 Symposium on Nuclear Data 2011-002 119 - 124 2010年 [査読有り][通常論文]
  • Fumihiro Masukawa, Yoshihiro Nakane, Yosuke Iwamoto, Hiroshi Nakashima
    NUCLEAR TECHNOLOGY 168 3 680 - 684 2009年12月 [査読有り][通常論文]
     
    The radioactivity produced in accelerator cooling water was estimated to determine the maintenance scenario of Japan Proton Accelerator Research Complex (J-PARC) accelerators. The PHITS and the MCNPX codes were used to calculate the proton and neutron fluxes in water-cooled accelerator components. The activation. cross-section sets of oxygen for high-energy protons and neutrons were evaluated from the available experimental data and theoretically calculated data by the INC/GEM and the LAHET codes. The radioactivity from corrosion products was also estimated by scaling of the measurements at the High Energy Accelerator Research Organization 12 GeV Proton Synchrotron Experiment (KEK-PS) and Los Alamos Meson Physics Facility (LAMPF). The tritium estimation is an acceptable level for disposal to the environment, while short-lived nuclides at the 3-GeV synchrotron may raise the dose rate in the machine room.
  • Yukio Sakamoto, Yosuke Iwamoto, Hiroshi Nakashima
    NUCLEAR TECHNOLOGY 168 3 654 - 658 2009年12月 [査読有り][通常論文]
     
    Three accelerator experiments on source? term and radiation shielding performed by the staffs of Japan Atomic Energy Agency (JAEA) to validate the accuracy of the radiation behavior simulation code PHITS (Particle and Heavy Ion Transport code System) are reviewed. In the measurement of neutron spectra from a thin beryllium target bombarded with similar to 10-MeV protons, measured peak energies and values of the cross section were the same as those in the Evaluated Nuclear Data File ENDF/B-VII. In the measurements of forward direction neutron spectra from thick targets bombarded with 140-, 250, and 350-MeV protons, the calculated spectra from an iron target by the PHITS code agreed well with the measured spectra. In the measurement of neutron spectra from a tungsten target bombarded with similar to 400-MeV protons, the shape of neutron spectra and its intensity are compared with that in Los Alamos Neutron Science Center/Weapons Neutron Research.
  • Hiroshi Nakashima
    RADIATION PROTECTION DOSIMETRY 137 1-2 35 - 50 2009年11月 [査読有り][通常論文]
     
    This paper describes operational radiation protection issues specific to high-intensity accelerators, aimed at the radiological safety of high-intensity accelerators during construction and operation. The paper is composed of chapters on safety characteristics, radiological safety design and safety management systems of high-intensity accelerators. The Japan Proton Accelerator Research Complex (J-PARC) is taken as a reference, because J-PARC was recently completed after collecting and referring to experiences with existing accelerator facilities all over the world.
  • Yoshihiro Nakane, Teruo Abe, Hiroshi Nakashima
    NUCLEAR TECHNOLOGY 168 2 519 - 523 2009年11月 [査読有り][通常論文]
     
    Radiation shielding calculations were performed for the shielding design around beam injection and beam extraction areas at the 3-GeV proton synchrotron in the Japan Proton Accelerator Research Complex (J-PARC) with the PHITS Monte Carlo code. Prompt dose rates outside the shields were obtained from calculated neutron energy spectra and flux-to-dose conversion coefficients prepared for the shielding design in J-PARC. The thicknesses of shields were determined from the comparison results of the prompt dose rates with the criteria of dose limit for the design in J-PARC.
  • H. Yashima, H. Iwase, M. Hagiwara, Y. Kirihara, S. Taniguchi, H. Yamakawa, K. Oishi, Y. Iwamoto, D. Satoh, Y. Nakane, H. Nakashima, T. Itoga, N. Nakao, T. Nakamura, A. Tamii, K. Hatanaka
    NUCLEAR TECHNOLOGY 168 2 298 - 303 2009年11月 [査読無し][通常論文]
     
    A shielding benchmark experiment has been performed to obtain the experimental data of neutrons penetrated through iron and concrete shields by using 140-, 250-, and 350-MeV p-Li quasi-monoenergetic neutrons. The quasi-monoenergetic neutrons were emitted from a 1-cm-thick Li target bombarded with 140-, 250-, and 350-MeV protons. The neutrons emitted in the forward direction were extracted into the time-of-flight room through a collimator of 12- X 10-cm aperture embedded in a 150-cm-thick concrete wall. The concrete and iron shield blocks were set at the exit of the collimator. Neutron energy spectra behind the shields were measured by a multimoderator spectrometer (He-3 proportional counter covered with polyethylene moderator of various thicknesses). Neutron energy spectra behind concrete and iron shields with different thicknesses were obtained down to thermal energy. The experimental results were compared with calculation results by the Monte Carlo simulation code PHITS. These experimental results will be useful as benchmark data to investigate the accuracy of various transport calculation codes.
  • H. Nakashima, Y. Sakamoto, Y. Iwamoto, N. Matsuda, Y. Kasugai, Y. Nakane, F. Masukawa, N. V. Mokhov, A. F. Leveling, D. J. Boehnlein, K. Vaziri, T. Sanami, H. Matsumura, M. Hagiwara, H. Iwase, N. Kinoshita, H. Hirayama, K. Oishi, T. Nakamura, H. Arakawa, N. Shigyo, K. Ishibashi, H. Yashima, N. Nakao, K. Niita
    NUCLEAR TECHNOLOGY 168 2 482 - 486 2009年11月 [査読有り][通常論文]
     
    Experimental studies of shielding and radiation effects are carried out at Fermi National Accelerator Laboratory (FNAL) under collaboration between FNAL and Japan, aiming at benchmarking simulation codes and studying irradiation effects for the upgrade and design of new high-energy accelerator facilities. The purposes of this collaboration are (a) acquisition of shielding data in a proton beam energy region above 100 GeV, (b) further evaluation of predictive accuracy of the PHITS and MARS codes, (c) modification of physics models and data in these codes if needed, (d) characterization of radiation fields for studies of radiation effects, and (e) development of a code module for an improved description of radiation effects. The first campaign of the experiment was carried out at the Pbar target station and NuMI experimental station at FNAL, which use irradiation of targets with 120-GeV protons for antiproton and neutrino production, respectively. The generated secondary particles passing through steel, concrete, and rock were measured by activation methods as well as by other detectors such as a scintillator with a veto counter, phoswich detector, and a Bonner ball counter on trial. Preliminary experimental and calculated results are presented.
  • T. Sanami, M. Hagiwara, T. Oishi, M. Hosokawa, S. Kamada, Su. Tanaka, Y. Iwamoto, H. Nakashima, M. Baba
    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 610 3 660 - 668 2009年11月 [査読有り][通常論文]
     
    A Bragg curve counter equipped with an internal production target was developed for the measurements of double-differential cross-sections of fragment production induced by neutrons at energies of tens of MeV. The internal target permitted a large detection solid angle and thus the registration of processes at low production rates. In this specific geometry, the detection solid angle depends on the emission angle and the range of the particle. Therefore the energy, atomic number, and angle of trajectory of the particle have to be taken into account for the determination of the solid angle. For the selection of events with tracks confined within a defined cylindrical volume around the detector axis, a segmented anode was applied. The double-differential cross-sections for neutron-induced production of lithium, beryllium, and boron fragments from a carbon target were measured at 0 degrees for 65 MeV neutrons. The results are in good agreement with theoretical calculation using PHITS code with GEM and ISOBAR model. (C) 2009 Elsevier B.V. All rights reserved.
  • Yosuke Iwamoto, Daiki Satoh, Masayuki Hagiwara, Hiroshi Iwase, Yoichi Kirihara, Hiroshi Yashima, Yoshihiro Nakane, Hiroshi Nakashima, Takashi Nakamura, Atsushi Tamii, Kichiji Hatanaka
    NUCLEAR TECHNOLOGY 168 2 340 - 344 2009年11月 [査読有り][通常論文]
     
    Neutron energy spectra at 90 deg produced from stopping-length graphite, aluminum, iron, and lead targets and at 180 deg produced from a thin lithium target bombarded with 140-MeV protons were measured in the irradiation room of the neutron time-of-flight (TOF) course at the Research Center of Nuclear Physics of Osaka University. The neutron energy spectra were obtained by using the TOF technique in the energy range from 10 MeV to the incident proton energy of 140 MeV. The experimental data for a thick target at 90 deg were compared with calculations performed with the Particle and Heavy Ion Transport code System (PHITS) using the evaluated nuclear data. It was shown that PHITS using the evaluated nuclear data is able to reproduce the secondary neutron spectra at 90 deg. The experimental data for a thin target at 180 deg were compared with calculations using the nuclear physics models in PHITS and the Monte Carlo N-Particle eXtended code (MCNPX). We found that the two codes work well at 180 deg in the neutron energy region above 10 MeV.
  • Davide Mancusi, Lembit Sihver, Koji Niita, Qiang Li, Tatsuhiko Sato, Hiroshi Iwase, Yosuke Iwamoto, Norihiro Matsuda, Yukio Sakamoto, Hiroshi Nakashima
    RADIATION AND ENVIRONMENTAL BIOPHYSICS 48 2 135 - 143 2009年04月 [査読有り][通常論文]
     
    Among the alternative beams being recently considered for external cancer radiotherapy, C-9 has received some attention because it is expected that its biological effectiveness could be boosted by the beta-delayed emission of two alpha particles and a proton that takes place at the ion-stopping site. Experiments have been performed to characterise this exotic beam physically and models have been developed to estimate quantitatively its biological effect. Here, the particle and heavy-ion transport code system (PHITS ) is used to calculate energy-deposition and linear energy transfer distributions for a C-9 beam in water and the results are compared with published data. Although PHITS fails to reproduce some of the features of the distributions, it suggests that the decay of C-9 contributes negligibly to the energy-deposition distributions, thus contradicting the previous interpretation of the measured data. We have also performed a microdosimetric calculation to estimate the biological effect of the decay, which was found to be negligible; previous microdosimetric Monte-Carlo calculations were found to be incorrect. An analytical argument, of geometrical nature, confirms this conclusion and gives a theoretical upper bound on the additional biological effectiveness of the decay. However, no explanation can be offered at present for the observed difference in the biological effectiveness between C-9 and C-12; the reproducibility of this surprising result will be verified in coming experiments.
  • BENCHMARK EXPERIMENT OF NEUTRON PENETRATION THROUGH IRON AND CONCRETE SHIELDS FOR HUNDREDS-OF-MeV QUASI-MONOENERGETIC NEUTRONS—II: MEASUREMENTS OF NEUTRON SPECTRUM BY AN ORGANIC LIQUID SCINTILLATOR
    M. HAGIWARA, H. IWASE, Y. KIRIHARA, H. YASHIMA, Y. IWAMOTO, D. SATOH, Y. NAKANE, H. NAKASHIMA, T. NAKAMURA, A. TAMII, K. HATANAKA
    NUCLEAR TECHNOLOGY 168 304 - 309 2009年 [査読無し][通常論文]
  • Yosuke Iwamoto, Yukio Sakamoto, Norihiro Matsuda, Yoshihiro Nakane, Kentaro Ochiai, Hirohisa Kaneko, Koji Niita, Tokushi Shibata, Hiroshi Nakashima
    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 598 3 687 - 695 2009年01月 [査読無し][通常論文]
     
    Double-differential neutron-production cross-sections of a thin beryllium target bombarded with 10 MeV protons and deuterons were measured. Neutron energy spectra in the range above 1.8 MeV were obtained by a time-of-flight method at angles of 15 degrees, 30 degrees, 45 degrees, 60 degrees, 75 degrees, 90 degrees and 120 degrees. Monte Carlo calculations with the PHITS code were performed using the evaluated nuclear data files ENDF/B-VII, the Bertini/GEM model and the JQMD/GEM model, and compared with the experimental results. It was found that the calculated results using ENDF/B-VII and Bertini/GEM for the Be-9(p,xn) reaction and JQMD/GEM for the Be-9(d,xn) reaction roughly agreed with the experimental results. (c) 2008 Elsevier B.V. All rights reserved.
  • Yosuke Iwamoto, Shingo Taniguchi, Noriaki Nakao, Toshiro Itoga, Hiroshi Yashima, Takashi Nakamura, Daiki Satoh, Yoshihiro Nakane, Hiroshi Nakashima, Yoichi Kirihara, Masayuki Hagiwara, Hiroshi Iwase, Koji Oishi, Atsushi Tamii, Kichiji Hatanaka
    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 593 3 298 - 306 2008年08月 [査読有り][通常論文]
     
    Neutron energy spectra at 0 degrees produced from stopping-length graphite, aluminum, iron and lead targets bombarded with 140, 250 and 350 MeV protons were measured at the neutron TOF course in RCNP of Osaka University. The neutron energy spectra were obtained by using the time-of-flight technique in the energy range from 10 MeV to incident proton energy. To compare the experimental results, Monte Carlo calculations with the PHITS and MCNPX codes were performed using the JENDL-HE and the LA150 evaluated nuclear data files, the ISOBAR model implemented in PHITS, and the LAHET code in MCNPX. It was found that these calculated results at 0 degrees generally agreed with the experimental results in the energy range above 20 MeV except for graphite at 250 and 350 MeV. (C) 2008 Elsevier B.V. All rights reserved.
  • Yoshihiro Nakane, Fumihiro Masukawa, Teruo Abe, Yosuke Iwamoto, Hiroshi Nakashima
    JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY 62 - 65 2008年06月 [査読有り][通常論文]
     
    Radiation shielding calculations for the subject of bulk shielding, duct streaming and skyshine were performed for the shielding design of the 3-GeV proton synchrotron accelerator in the J-PARC facility with both the simplified calculation methods including semi-empirical formulas and the Monte Carlo methods. Calculation results of dose rates at the boundary of radiation controlled area and the site boundary are compared with the dose limit defined in the regulation law of Japan.
  • Fumihiro Masukawa, Yoshihiro Nakane, Hiroshi Nakashima
    JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY 104 - 107 2008年06月 [査読有り][通常論文]
     
    The J-PARC LINAC accelerated the H-minus beam up to the energy of 181 MeV, which is the design value, on January 24th, and got the official license for the beam operation on February 27th, 2007. The beam losses are enough small that the detectable radiation leaks to the working area can be scarcely observed, while the inevitable activation of the beam-line components start slowly. In this paper, we briefly report the method used in the radiation shielding calculation of the J-PARC LINAC.
  • 松田 規宏, 岩元 洋介, 原田 正英, 勅使河原 誠, 明午 伸一郎, 前川 藤夫, 小栗 朋美, 中野 秀生, 中尾 徳晶, 中根 佳弘, 中島 宏
    JAEA-Technology 2008-030 1 - 150 2008年03月 [査読無し][通常論文]
     
    大強度陽子加速器施設J-PARC(Japan Proton Accelerator Research Complex)の放射線遮蔽設計及び許認可申請における安全解析においては、数種類の高エネルギー粒子輸送計算コードが用いられている。そこで、これらの計算コードについて精度評価を行うため、おもに実験に基づいた、厚いターゲットからの中性子生成量,ビームダンプ体系,遮蔽体深層透過及びストリーミングといった遮蔽ベンチマーク問題を作成し、解析を行った。その結果、各計算コードによる結果が、全体としてファクター2以内の精度で実験値を再現することを示した。
  • H. Matsumura, T. Miura, A. Toyoda, N. Matsuda, M. Numajiri, H. Nakashima, K. Masumoto, T. Suzuki, K. Saito
    Nuclear Instruments and Methods in Physics Research B 266 16 3647 - 3655 2008年 [査読無し][通常論文]
  • T. Sanami, M. Hagiwara, H. Iwase, Y. Iwamoto, Y. Sakamoto, H. Nakashima, H. Arakawa, N. Shigyo, D. J. Boehnlein, A. F. Leveling, N. V. Mokhov, K. Vaziri, N. Nakao
    Proceedings of the 22nd Workshop on Radiation Detectors and Their Uses 148 - 159 2008年 [査読有り][通常論文]
  • H. Nakashima, Y. Nakane, F. Masukawa, N. Matsuda, Y. Iwamoto, T. Shibata, N. Nakao, T. Suzuki, H. Hirayama
    8th International Topical Meeting on Nuclear Applications and Utilization of Accelerators, ACCAPP'07 253 - 258 2007年12月01日 [査読無し][通常論文]
     
    The J-PARC (Japan Proton Accelerator Research Complex) project is now in progress. In order to establish a reasonable shielding design for J-PARC, shielding calculation methods with high accuracy were strongly required and benchmarking of the methods was carried out. This paper reviews the benchmark calculation for the detailed calculation methods used in the J-PARC shielding design.
  • 中根 佳弘, 岩元 洋介, 坂本 幸夫, 中島 宏
    日本原子力学会 年会・大会予稿集 2007 0 83 - 83 一般社団法人 日本原子力学会 2007年 [査読有り][通常論文]
     
    100MeV以上の中性子に対する,粒子・重イオン輸送計算コードPHITSを用いた線量評価における精度検証を目的として,20~500MeVの単色中性子入射におけるプラスチックファントム内での吸収線量分布を計算した.
  • Davide Mancusi, Lembit Sihver, Katarina Gustafsson, Chiara La Tessa, Stephen B. Guetersloh, Cary J. Zeitlin, Jack Miller, Lawrence H. Heilbronn, Koji Niita, Tatsuhiko Sato, Hiroshi Nakashima, Takeshi Murakami, Yoshiyuki Iwata
    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS 254 1 30 - 38 2007年01月 [査読無し][通常論文]
     
    The PHITS (Particle and Heavy Ion Transport System) code is a three-dimensional Monte Carlo code that is able to simulate the transport of nuclei and other particles in complicated geometries and calculate fluxes, doses, energy-deposition distributions and many other observables. Among its many possible fields of application, it can be used e.g. to design and optimise radiation shields for space vessels. However, the reliability of the predictions of the code depends directly on the certified accuracy of the code components, i.e. the models the code uses to estimate the quantities necessary for the transport calculation. As a part of a comprehensive benchmarking program, we have investigated the possibility of using PHITS to calculate partial charge-changing cross sections and we have compared the results with measurements performed by some of us (CZ, LH, JM, SG). The results, although limited, suggest that the current reaction-cross-section models might be inadequate for use in space radioprotection; we therefore claim the need for a thorough benchmarking of the models and for new reaction-cross-section measurements and experimental techniques. (c) 2006 Elsevier B.V. All rights reserved.
  • Davide Mancusi, Lembit Sihver, Koji Niita, Qiang Li, Tatsuhiko Sato, Hiroshi Iwase, Yosuke Iwamoto, Norihiro Matsuda, Yukio Sakamoto, Hiroshi Nakashima
    FIRST EUROPEAN WORKSHOP ON MONTE CARLO TREATMENT PLANNING 74 2007年 [査読有り][通常論文]
     
    Carbon-9 beams represent one of the possible alternatives (presently under consideration and investigation) to conventional C-12 beams for heavy-ion cancer treatment. Interest in this exotic isotope stems from the expected boost in biological effectiveness due to the beta-delayed emission of two a particles and a proton that takes place at the ion stopping site. Experiments have been performed [1] to characterise C-9 beams physically and models have been developed [2] to estimate quantitatively its biological effect. In this work, we have used the PHITS code [3] to calculate energy-deposition and LET distributions for a 9C beam in water and we have compared the results with some published data [1]. Even though PHITS fails to reproduce some of the features of the distributions, its result is that decay gives a negligible contribution to the energy-deposition distributions, thus contradicting the previous interpretation of the measured data.
  • K. Niita, N. Matsuda, Y. Iwamoto, Y. Sakamoto, H. Nakashima, T. Sato, H. Iwase, L. Sihver, D. Mancusi
    HADRONIC SHOWER SIMULATION WORKSHOP 896 61 - + 2007年 [査読無し][通常論文]
     
    The paper presents a brief description of the models incorporated in PHITS and the present status of the code, showing some benchmarking tests of the PHITS code for accelerator facilities and space radiation.
  • L. Sihver, D. Mancusi, T. Sato, K. Niita, H. Iwase, Y. Iwamoto, N. Matsuda, H. Nakashima, Y. Sakamoto
    ADVANCES IN SPACE RESEARCH 40 9 1320 - 1331 2007年 [査読無し][通常論文]
     
    Many new options have recently been included in PHITS, e.g., to calculate LET distributions of particles in matter or energy-deposition distributions event by event and correlations between energy depositions in different regions. This makes it possible to calculate the effects of particle radiation on biological and non-biological materials, e.g., risk for single event upsets in electronic devices. As a part of an extensive ongoing benchmarking of PHITS, we have compared calculated partial projectile fragmentation cross sections with accelerator-based measurements from the reactions of 200-1000 MeV/n (4)He, (12)C, (14)N, (16)O, (20)Ne, (28)Si, (40)Ar, and (56)Fe on polyethylene, carbon, aluminum, copper, tin and lead, with different thicknesses, using different total reaction cross section models in PHITS. We have compared simulated and measured Bragg and attenuation curves of 200 MeV/n (12)C in water, and neutron energy spectra, at different angles, from 100 to 400 MeV/n (12)C stopped in water. Bragg curves for 110, 140, 170, 190 and 225 MeV/n (3)He in water have been studied, as well as gamma-ray dose decay curves of activated Cu target bombarded by 400 and 800 MeV/n (40)Ar. When using the default total reaction cross section model developed by Tripathi et al. (1996,1997 and 1999) [Tripathi, R.K., Cucinotta, F.A., Wilson, J.W. Accurate universal parameterization of absorption cross sections, Nucl. Instr. Methods B117, 347, 1996; Tripathi, R.K., Wilson, J.W., Cucinotta, F.A. Accurate universal parameterization of absorption cross sections II - neutron absorption cross sections. Nucl. Instr. Methods B129, 11, 1997; Tripathi, R.K., Cucinotta, F.A., Wilson, J.W. Accurate universal parameterization of absorption cross sections III - light systems. Nucl. Instr. Methods B155, 349, 1999.] the partial fragmentation cross sections appear to be systematically slightly underestimated by a factor which is independent on the fragment species within the same data set, and so do the simulated neutron energy spectra from selected heavy ion reactions; especially in the forward direction. The simulated attenuation and Bragg curves, however, show good agreement with measured ones. These observations stimulate further benchmarking to confirm the accuracy of the code and gives directions on possible improvements to be applied to the code in the near future. (C) 2007 Published by Elsevier Ltd on behalf of COSPAR.
  • S. Taniguchi, N. Nakao, T. Nakamura, H. Yashima, Y. Iwamoto, D. Satoh, Y. Nakane, H. Nakashima, T. Itoga, A. Tamii, K. Hatanaka
    RADIATION PROTECTION DOSIMETRY 126 1-4 23 - 27 2007年 [査読無し][通常論文]
     
    A quasi-monoenergetic neutron field using the Li-7(p,n)Be-7 reaction has been developed at the ring cyclotron facility at the Research Center for Nuclear Physics (RCNP), Osaka University. Neutrons were generated from a 10-mm-thick Li target injected by 250, 350 and 392 MeV protons and neutrons produced at 0 degrees were extracted into the time-of-flight (TOF) room of 100-m length through the concrete collimator of 10 X 12 cm aperture and 150 cm thickness. The neutron energy spectra were measured by a 12.7-cm diam x 12.7-cm long NE213 organic liquid scintillator using the TOF method. The peak neutron fluence was 1.94 X 10(10), 1.07 X 10(10) and 1.50 X 10(10) n sr(-1) per mu C of 250, 350 and 392 MeV protons, respectively. The neutron spectra generated from various thick (stopping length) targets of carbon, aluminium, iron and lead, bombarded by 250 and 350 MeV protons, were also measured with the TOF method. Although these measurements were performed to obtain thick target neutron yields, they are also used as a continuous energy neutron field. These neutron fields are very useful for characterising neutron detectors, measuring neutron cross sections, testing irradiation effects for various materials and performing neutron shielding experiments.
  • M. Hagiwara, T. Sanami, T. Oishi, S. Kamada, T. Okuji, S. Tanaka, H. Nakashima, M. Baba
    RADIATION PROTECTION DOSIMETRY 126 1-4 104 - 108 2007年 [査読有り][通常論文]
     
    Experimental differential cross sections of fragment emission (p, d, t, alpha, Li, Be and B), which were obtained for tens of mega electron volt neutrons on carbon and aluminum, using a counter telescope array and a Bragg-curve counter specially developed for neutron-induced reactions, are presented and compared with theoretical calculations using various reaction models. A calculation with the ISOBAR and GEM models was found to reproduce the experimental data except for an underestimation in non-vaporation processes. Calculations of the energy deposition by neutrons in a thin silicon layer show significant differences among the model employed.
  • Koji Niita, Tatsuhiko Sato, Hiroshi Iwase, Hiroyuki Nose, Hiroshi Nakashima, Lembit Sihver
    RADIATION MEASUREMENTS 41 9-10 1080 - 1090 2006年10月 [査読有り][通常論文]
     
    The paper presents a summary of the recent development of the multi-purpose Monte Carlo Particle and Heavy Ion Transport code System, PHITS. In particular, we discuss in detail the development of two new models, JAM and JQMD, for high energy particle interactions, incorporated in PHITS, and show comparisons between model calculations and experiments for the validations of these models. The paper presents three applications of the code including spallation neutron source, heavy ion therapy and space radiation. The results and examples shown indicate PHITS has great ability of carrying out the radiation transport analysis of almost all particles including heavy ions within a wide energy range. (c) 2006 Elsevier Ltd. All rights reserved.
  • Tatsuhiko Sato, Koji Niita, Hiroshi Iwase, Hiroshi Nakashima, Yasuhiro Yamaguchi, Lembit Sihver
    RADIATION MEASUREMENTS 41 9-10 1142 - 1146 2006年10月 [査読有り][通常論文]
     
    Development of HZE particle transport codes is severely required for the shielding design of spacecrafts. One-dimensional deterministic codes are generally adopted in the shielding calculation because of their reasonable computational time, but three-dimensional Monte Carlo codes are also to be employed especially in the final step of the design with fully optimized geometries. We are therefore developing a general-purpose Monte Carlo code PHITS, which can deal with the transports of all kinds of hadrons and heavy ions with energies up to 200 GeV/n. For the purpose of examining the applicability of PHITS to the shielding design, neutron and charged particle spectra inside the Space Shuttle were calculated for an imaginary vessel whose shielding distribution is fitted to that of the real shuttle. Absorbed doses and dose equivalents were estimated from the spectra by applying fluence to dose conversion coefficients. The agreements between the calculated spectra or doses and the corresponding experimental data were generally satisfactory, especially for the neutron spectra, which have been barely reproduced by other studies. We therefore concluded that PHITS has a great possibility of playing an important role in the design study of spacecrafts. (c) 2006 Elsevier Ltd. All rights reserved.
  • Yosuke Iwamoto, Shingo Taniguchi, Noriaki Nakao, Toshiro Itoga, Takashi Nakamura, Yoshihiro Nakane, Hiroshi Nakashima, Daiki Satoh, Hiroshi Yashima, Hiroshi Yamakawa, Koji Oishi, Yoshitomo Uwamino, Atsushi Tamii, Kichiji Hatanaka, Mamoru Baba
    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 562 2 789 - 792 2006年06月 [査読有り][通常論文]
     
    Neutron energy spectra at 0-degree produced from stopping-length graphite, Al, Fe and Pb targets bombarded by 350 MeV protons were measured at the neutron TOF course at RCNP of Osaka University. The experiments were performed by the time-of-flight technique with the flight path length of 11.4 and 95 m, and neutron energy spectra were obtained in the energy range from 10 MeV upto the maximum energy 350 MeV. Monte Carlo calculations by MCNPX, PHITS and MARS 15 were performed to compare the obtained experimental data, and these simulation results at 0-degree generally underestimated the experimental data for all targets in the energy range above 20 MeV. (c) 2006 Elsevier B.V. All rights reserved.
  • 岩元 洋介, 山川 祐司, 大石 晃嗣, 民井 淳, 畑中 吉次, 谷口 真吾, 中尾 徳晶, 糸賀 俊朗, 中村 尚司, 中根 佳弘, 中島 宏, 佐藤 大樹, 八島 浩
    日本原子力学会 年会・大会予稿集 2006 0 50 - 50 一般社団法人 日本原子力学会 2006年 [査読有り][通常論文]
     
    250MeV,350MeV陽子入射による厚いターゲットからの0°方向における中性子生成収率の測定結果とPHITS,MCNPXによる計算結果を比較した。計算は実験結果を中性子エネルギー20MeV以上で過小評価することが分かった。
  • Radiation streaming experiment through a labyrinth of the 12 GeV proton accelerator facility at KEK(2)-TLD rem-counter method
    H Nakamura, T Miura, M Numajiri, N Nakao, H Nakashima, N Matsuda, S Watanabe
    RADIATION PROTECTION DOSIMETRY 116 1-4 252 - 255 2005年12月 [査読有り][通常論文]
     
    The doses of radiation streaming through a labyrinth were measured using thermoluminescence dosemeters (TLDs) and neutron moderators for TLDs at the neutrino beam line of the 12 GeV proton accelerator facility of High Energy Accelerator Research Organization (KEK). The calculated doses using the Monte Carlo code, MCNPX basically agreed with the experimental results. However, unexpectedly, the calculated neutron doses were smaller than the measured ones along the upstream side of the labyrinth.
  • N Nakao, H Yashima, M Kawai, K Oishi, H Nakashima, K Masumoto, H Matsumura, S Sasaki, M Numajiri, T Sanami, Q Wang, A Toyoda, K Takahashi, K Iijima, K Eda, S Ban, H Hirayama, S Muto, T Nunomiya, S Yonai, DRH Rasolonjatovo, K Terunuma, K Yamauchi, PK Sarkar, E Kim, T Nakamura, A Maruhashi
    RADIATION PROTECTION DOSIMETRY 116 1-4 553 - 557 2005年12月 [査読有り][通常論文]
     
    An irradiation field of high-energy neutrons produced in the forward direction from a thick tungsten target bombarded by 500 MeV protons was arranged at the KENS spallation neutron source facility. In this facility, shielding experiment was performed with an ordinary concrete shield of 4 m thickness assembled in the irradiation room, 2.5 m downstream from the target centre. Activation detectors of bismuth, aluminium, indium and gold were inserted into eight slots inside the shield and attenuations of neutron reaction rates were obtained by measurements of gamma-rays from the activation detectors. A MARS14 Monte Carlo simulation was also performed down to thermal energy, and comparisons between the calculations and measurements show agreements within a factor of 3. This neutron field is useful for studies of shielding, activation and radiation damage of materials for high-energy neutrons, and experimental data are useful to check the accuracies of the transmission and activation calculation codes.
  • F Maekawa, S Meigo, Y Kasugai, H Takada, T Ino, S Sato, E Jerde, D Glasgow, K Niita, H Nakashima, Y Oyama, Y Ikeda, N Watanabe, J Hastings
    NUCLEAR SCIENCE AND ENGINEERING 150 1 99 - 108 2005年05月 [査読有り][通常論文]
     
    A neutronic benchmark experiment on a simulated spallation neutron target assembly was conducted by using the Alternating Gradient Synchrotron at Brookhaven National Laboratory and was analyzed to investigate the prediction capability of Monte Carlo simulation codes used in neutronic designs of spallation neutron sources. The target assembly consisting of a mercury target, a light water moderator, and a lead reflector was bombarded by 1.94-, 12-, and 24-GeV protons, and the fast neutron flux distributions around the target and the spectra of thermal neutrons leaking from the moderator were measured in the experiment. In this study, the Monte Carlo particle transport simulation codes NMTC/JAM, MCNPX, and MCNP-4A with associated cross-section data in JENDL and LA-150 were verified based on benchmark analysis of the experiment. As a result, all the calculations predicted the measured quantities adequately; calculated integral fluxes of fast and thermal neutrons agreed approximately within +/- 40% with the experiments although the overall energy range encompassed more than 12 orders of magnitude. Accordingly, it was concluded that these simulation codes and cross-section data were adequate for neutronics designs of spallation neutron sources.
  • K Oishi, N Nakao, K Kosako, H Yamakawa, H Nakashima, M Kawai, H Yashima, T Sanami, M Numajiri, T Shibata, H Hirayama, T Nakamura
    RADIATION PROTECTION DOSIMETRY 115 1-4 623 - 629 2005年 [査読有り][通常論文]
     
    Precise estimation of induced activities in concrete shields for high-energy accelerator facilities is one of the most important issues that need to be solved, not only for the reduction of exposure for workers, but also for the reduction of radioactive wastes. Irradiation experiments have been performed by using the 500 MeV Neutron Spallation Source Facility in KEK. The large concrete assembly was placed in the direction of 0 degrees to the beamline. Two kinds of samples were placed at several positions in the assembly. The irradiation period was about I week and induced activities in the samples were measured until similar to 1.5 y after irradiation. From the comparison between the experiment and the available Monte Carlo calculation code system, good agreement was obtained for Na-24, (SC)-S-47, Ca-47 and Mn-54 within a factor 2; however, large discrepancies were observed for some other nuclides.
  • 岩元 洋介, 大石 晃嗣, 中村 尚司, 上蓑 義朋, 民井 淳, 畑中 吉治, 馬場 護, 谷口 真吾, 糸賀 俊朗, 中尾 徳晶, 中根 佳弘, 中島 宏, 佐藤 大樹, 八島 浩, 山川 裕司
    日本原子力学会 年会・大会予稿集 2005 0 53 - 53 一般社団法人 日本原子力学会 2005年 [査読有り][通常論文]
     
    350MeV陽子入射による0度方向における黒鉛、アルミニウム、鉄、鉛の厚いターゲットからの中性子エネルギースペクトルの測定を行った。実験結果を計算コードPHITS,MCNPXと比較した。
  • 山川 裕司, 佐藤 大樹, 糸賀 俊朗, 上蓑 義朋, 民井 淳, 畑中 吉治, 谷口 真吾, 中尾 徳晶, 大石 晃嗣, 中村 尚司, 八島 浩, 岩元 洋介, 中根 佳弘, 中島 宏
    日本原子力学会 年会・大会予稿集 2005 0 57 - 57 一般社団法人 日本原子力学会 2005年 [査読有り][通常論文]
     
    350MeV準単色中性子を用いて、コンクリートおよび鉄の遮蔽体透過実験を行った。コンクリートの厚さ250mmから2000mm、および鉄の厚さ100mmから1000mmにおける透過中性子を球形多減速材付検出器(ボナー検出器)を用いて測定し、SAND-IIによるアンフォールディング法により中性子スペクトルを求めた。また、モンテカルロ計算コードPHITSによる中性子スペクトルの計算結果と比較した。
  • Development of a nuclear reaction database on silicon for simulation of neutron-induced single-event upsets in microelectronics and its application
    Y Watanabe, A Kodama, Y Tukamoto, H Nakashima
    International Conference on Nuclear Data for Science and Technology, Pts 1 and 2 769 1646 - 1649 2005年 [査読有り][通常論文]
     
    We have developed a cross-section database for neutron-induced reactions on Si-28 in the energy range between 2 MeV and 3 GeV in order to analyze single-event upsets (SEUs) phenomena induced by cosmic-ray neutrons in microelectronic devices. A simplified spherical device model is proposed for simulation of the initial processes of SEUs. The model is applied to SEU cross-section calculations for semiconductor memory devices. The calculated results are compared with measured SEU cross sections and the other simulation result. The dependence of SEU cross sections on incident neutron energy and secondary ions having the most important effects on SEUs are discussed.
  • T Sato, L Sihver, H Iwase, H Nakashima, K Niita
    SPACE LIFE SCIENCES: GROUND-BASED IRON-ION BIOLOGY AND PHYSICS, INCLUDING SHIELDING 35 2 208 - 213 2005年 [査読無し][通常論文]
     
    In order to estimate the biological effects of HZE particles, an accurate knowledge of the physics of interaction of HZE particles is necessary. Since the heavy ion transport problem is a complex one, there is a need for both experimental and theoretical studies to develop accurate transport models. RIST and JAERI (Japan), GSI (Germany) and Chalmers (Sweden) are therefore currently developing and bench marking the General-Purpose Particle and Heavy-lon Transport code System (PHITS), which is based on the NMTC and MCNP for nucleon/meson and neutron transport respectively, and the JAM hadron cascade model. PHITS uses JAERI Quantum Molecular Dynamics (JQMD) and the Generalized Evaporation Model (GEM) for calculations of fission and evaporation processes, a model developed at NASA Langley for calculation of total reaction cross sections, and the SPAR model for stopping power calculations. The future development of PHITS includes better parameterization in the JQMD model used for the nucleus-nucleus reactions, and improvement of the models used for calculating total reaction cross sections, and addition of routines for calculating elastic scattering of heavy ions, and inclusion of radioactivity and burn up processes. As a part of an extensive bench marking of PHITS, we have compared energy spectra of secondary neutrons created by reactions of HZE particles with different targets, with thicknesses ranging from < 1 to 200 cm. We have also compared simulated and measured spatial, fluence and depth-dose distributions from different high energy heavy ion reactions. In this paper, we report simulations of an accelerator-based shielding experiment, in which a beam of 1 GeV/n Fe-ions has passed through thin slabs of polyethylene, Al, and Ph at an acceptance angle up to 4 degrees. (c) 2005 Published by Elsevier Ltd on behalf of COSPAR.
  • Y Watanabe, T Fukahori, K Kosako, N Shigyo, T Murata, N Yamano, T Hino, K Maki, H Nakashima, N Odano, S Chiba
    INTERNATIONAL CONFERENCE ON NUCLEAR DATA FOR SCIENCE AND TECHNOLOGY, PTS 1 AND 2 769 326 - 331 2005年 [査読無し][通常論文]
     
    An overview is presented of recent nuclear data evaluations performed for the JENDL high-energy (JENDL-HE) file, in which neutron and proton cross sections for energies up to 3 GeV are included for the whole 132 nuclides. The current version of the JENDL-HE file consists of neutron total cross sections, nucleon elastic scattering cross sections and angular distributions, nonelastic cross sections, production cross sections and double-differential cross sections of secondary light particles (n, p, d, t, (3)He, alpha, and pi) and gamma-rays, isotope production cross sections, and fission cross sections in the ENDF6 format. The present evaluations are performed on the basis of experimental data and theoretical model calculations. For the cross section calculations, we have constructed a hybrid calculation code system with some available nuclear model codes and systematics-based codes, such as ECIS96, OPTMAN, GNASH, JQMD, JAM, TOTELA, FISCAL, and so on. The evaluated cross sections are compared with available experimental data and the other evaluations. Future plans of our JENDL-HE project are discussed along with prospective needs for high-energy cross section data.
  • Analytical method for multi-scattered neutrons in cavity used in the duct-III code
    K Hayashi, R Tayama, H Handa, K Shin, H Hirayama, H Nakano, F Masukawa, H Nakashima, N Sasamoto
    SHIELDING ASPECTS OF ACCELERATORS, TARGETS AND IRRADIATION FACILITIES, WORKSHOP PROCEEDINGS 377 - 387 2004年 [査読有り][通常論文]
     
    A formula for multi-scattered radiation flux in a spherical cavity based on the albedo analytical method developed by Shin, et al. is employed in the DUCT-III code to estimate wall-scattered radiations. The albedo data used in this formula is a neutron albedo library originally stored in the DUCT-III code, the energy of which is thermal to 3 GeV for concrete and iron. A comparison of calculated cavity-streaming results by DUCT-III and MCNP4B (or MCNPX) was made to validate DUCT-III as a design code. The calculated dose rate by DUCT-III in the duct was 1.1-1.4 times higher than that calculated by MCNP4B (or MCNPX). Although we obtained slightly conservative results, it can be concluded that DUCT-III is suitable for use in cavity-streaming design.
  • 春日井 好己, 甲斐 哲也, 前川 藤夫, 中島 宏, 高田 弘, 今野 力, 沼尻 正晴, 猪野 隆, 高橋 一智
    JAERI-Research 2003-034 1 - 115 2004年01月 [査読無し][通常論文]
     
    ブルックヘブン国立研究所のAGS(Alternative Gradient Synchrotron)加速器を使って、2.83, 24GeVの陽子及びそれら陽子が水銀ターゲットに入射し発生する核破砕中性子による誘導放射能の測定実験を行った。ホウ素,炭素,アルミ,鉄,銅,ニオブ,酸化水銀,鉛,ビスマス,アクリル,SUS316,Inconel-625及びInconel-718の試料を水銀ターゲットの周りで照射した。照射後、冷却時間2時間から200日において、それぞれの試料の放射能をHPGe検出器で測定した。測定した$gamma$線スペクトルから90以上の放射性核種を同定し、それらの放射能データを得た。このレポートは、これらの実験手順,データ処理及び測定結果をまとめたものである。
  • Measurement of Fragment Production Cross-section on Nucleon-induced Reaction
    M. Hagiwara, T. Oishi, M. Baba, T. Sanami, H. Nakashima, S. Tanaka, M. Takada
    Proceedings of the 2004 symposium on nuclear data, JAERI-Conf 2005-005 112  2004年 [査読有り][通常論文]
  • KENS Shielding Experiment (1): Establishment of High Energy Neutron Irradiation Facility and Measurement of
    N. Nakao, M. Kawai, K. Oishi, H. Nakashima, S. Sasaki, K. Masumoto, M. Numajiri, T. Sanami
    J. Nucl. Sci. Technol. Suppl.4 22 - 25 2004年 [査読有り][通常論文]
  • Current status of the AGS spallation target experiment
    H Nakashima, H Takada, Y Kasugai, S Meigo, F Maekawa, T Kai, C Konno, Y Ikeda, Y Oyama, N Watanabe, M Arai, T Ino, M Kawai, M Numajiri, S Sato, K Takahashi, Y Kiyanagi, H Conrad, D Filges, R Neef, H Stechemesser, H Spitzer, GS Bauer, E Jerde, D Glasgow, J Haines, T Gabriel, P Montanez, A Carroll, H Ludewig, J Hastings
    SHIELDING ASPECTS OF ACCELERATORS, TARGETS AND IRRADIATION FACILITIES, WORKSHOP PROCEEDINGS 27 - 36 2004年 [査読有り][通常論文]
     
    In preparation for the construction of next-generation neutron sources, a series of experiments were performed using a mercury target assembly with a water moderator and a lead reflector at the AGS accelerator. In a bare target experiment, neutron spatial and energy distributions around the target were obtained at proton energies of 1.6-24 GeV using an activation method. The radioactivities induced in activation samples placed around the mercury target were also measured. Using a mercury target with a water moderator and a lead reflector, the spectral intensity of slow neutrons from the moderator was measured with only a few proton pulses with a newly developed technique, a current mode time-of-flight detector. A shielding experiment was also carried out to measure neutron attenuation in lateral shields of ordinary concrete and steel. This paper reviews the experimental results and the current status of the analyses.
  • Sanami T, Baba M, Hagiwara M, Hiroishi T, Hosokawa M, Hirabayashi N, Oishi T, Nakashima H, Tanaka S
    Journal of Nuclear Science and Technology 41 502 - 505 2004年 [査読有り][通常論文]
  • Nakao N, Yashima H, Kawai M, Oism K, Nakashima H, Sasaki S.-I, Masumoto K, Numajiri M, Sanami T, Matsumura H, Wang Q, Toyoda A, Iijima K, Takahashi K, Bani S, Hirayama H, Muto S, Nunomiya T, Yonai S, Rasolonjatovo D.R.H, Terunuma K, Nakamura T, Kim E, Sarkar P.K, Maruhashi A
    Journal of Nuclear Science and Technology 41 22 - 25 2004年 [査読有り][通常論文]
  • Validity of the four-parameter empirical formula in approximating the response functions for gamma-ray, neutron, and secondary gamma-ray skyshine analyses
    Y Harima, H Hirayama, Y Sakamoto, N Sasamoto, F Masukawa, H Nakashima, K Hayashi, H Handa, R Tayama, N Kurosawa, M Nemoto, T Abe
    JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY 40 8 569 - 578 2003年08月 [査読有り][通常論文]
     
    A four-parameter approximating formula, R=A e(a)x(b) f (x), accurately represents the skyshine line beam response function (LBRF) as a function of the distance (x) of the source-to-detector separation. Here, A is a constant for a given source energy and f (x)=e(cx)x(dx) is a damping factor. The four parameters are obtained as follows. (1) The value of parameter a corresponds to that of the LBRF at x=1 meter, which is the result of integrating the basic dose spectrum due to a single scattering particle from an emitted beam for a specified angle and a specified source energy. (2) The value of parameter b corresponds to the slope of a straight line of the response function, log R vs. log x, in the range of small distance from a source, where a single scattering particle dominates. (3) The damping factor (f (x)) represents the attenuation trend of the LBRF at distances far from the source; the values of parameters c and d control the quantity of attenuation. The necessary reference LBRF data for point mono-directional photon source energies ranging from 0.1 to 10 MeV were generated using the EGS4 Monte Carlo code at 20 emission angles from 0.0 to 180degrees for 24 source-detector distances up to 2,000 m. The validity of using the four-parameter formula to interpolate the LBRF in the source-to-detector distance, in the emitted angle, and in the energy was also ascertained. Furthermore, this formula was applied to the skyshine conical beam response function (CBRF) for a neutron and an associated secondary gamma-ray with the source energy ranged from thermal to 3 GeV. It was ascertained that the CBRF could be accurately approximated by an interpolation of the fitting parameters at an arbitrary distance and emitted cosine angle.
  • Measurement of Double Differential Cross Sections for Fragment-production Induced by Tens of MeV Particles
    M. Hagiwara, M. Baba, T. Oishi, T. Sanami, H. Nakashima, S. Tanaka, M. Takada
    Proceedings of the 2003 symposium on nuclear data. JAERI-Conf 2004-005 115  2003年 [査読有り][通常論文]
  • Sanami T, Hiroishi T, Baba M, Hagiwara M, Miura T, Aoki T, Kawata N, Tanaka S, Nakashima H, Meigo S.-I, Takada M
    Journal of Nuclear Science and Technology 39 421 - 424 2002年 [査読有り][通常論文]
  • S Tanaka, H Nakashima, Y Sakamoto, Y Nakane, S Meigo, S Tanaka, T Nakamura, M Takada, T Kurosawa, H Hirayama, N Nakao, Y Uwamino, M Imamura, K Shin
    HEALTH PHYSICS 81 4 406 - 418 2001年10月 [査読有り][通常論文]
     
    A radiation streaming experiment has been carried out at the Takasaki Ion Accelerator Facility for Advanced Radiation Application at the Japan Atomic Energy Research Institute in a room housing a Cu target irradiated with 68 MeV protons and in a labyrinth of three-legs having a total length of 29 m. In the experiment, neutron and gamma ray energy spectra, neutron reaction rates, and neutron and gamma ray dose equivalent rates were measured using various counters and dosimeters. The experimental data show the applicability of some empirical formulas for estimating the thermal neutron flux in a room and neutrons streaming in a labyrinth designed for a proton accelerator operating in the intermediate energy region. The data suggest that it is mandatory to estimate the gamma ray dose equivalent rate in a labyrinth, which is dominated by the secondary gamma rays due to the neutron capture reaction.
  • 春日井 好己, 高田 弘, 中島 宏, 坂田 英明, 前川 藤夫, 池田 裕二郎, 川合 將義, 猪野 隆, Jerde, E, Glasgow, D, ASTE Collaboration
    JAERI-Conf 2001-002 955 - 963 2001年03月 [査読無し][通常論文]
     
    GeV陽子を使ったMW級の強力中性子源の建設が計画されている。そのため、放射線安全解析において、大量の中性子やGeV領域の陽子に伴う放射線場中での誘導放射能の見積もりが必要とされている。その計算コードの精度評価のため、ブルックヘブン国立研究所のAGS加速器を使った核破砕中性子場による誘導放射能に対する積分実験をASTE共同実験の一環として行った。核破砕中性子は、水銀ターゲットに1.6, 12, 24GeVの陽子を入射させることにより発生させた。入射陽子の数は、それぞれの照射に対して、3$sim$4$times$10$^{13}$個であった。照射した箔は、アルミニウム,チタン,ニッケル,コバルト,イットリウム,ニオブ,インジウム,ツリウム,及びビスマスで、それらをターゲットのビーム入射面から10$sim$20cmの位置においた。照射後、その誘導放射能を数時間から数ヶ月のいくつかの冷却時間で測定した。実験結果は、NMTC/JAMと融合したDCHAIN-SPコードによる計算値と比較した。断面積データを含めた計算の妥当性について議論する。
  • 明午 伸一郎, 中島 宏, 高田 弘, 春日井 好己, 猪野 隆, 前川 藤夫, Hastings, J, 渡辺 昇, 大山 幸夫, 池田 裕二郎
    JAERI-Data/Code 2001-014 1 - 23 2001年03月 [査読無し][通常論文]
     
    1.94,12及び24GeV陽子を水銀ターゲットに入射し、ターゲット内の温度,圧力波及び中性子特性を測定するAGS核破砕ターゲット実験における入射ビームのプロファイルと強度の測定を行った。入射陽子ビームプロファイルのオンライン検出器としてセグメント化された平行平板電離箱(CHIDORI)を用いた。また、プロファイルはアルミ箔を陽子ビームで放射化し、これから生成する$gamma$及び$beta$線の強度分布をイメージングプレート(IP)で検出する方法を測定した。ビーム強度の測定には積分型カレントトランスフォーマー(ICT)及び銅箔の放射化法を用いた。CHIDORI及びIPによるプロファイルの結果は良い一致を示した。また、ICT法と放射化法によるビーム強度の結果は、12及び24GeV陽子に対し3%以内で良い一致を示した。さらに、これらの値はAGSのチームが設置したセグメント型ワイヤー電離箱(SWIC)及び二次放出電離箱(SEC)による結果と良い一致を示した。以上より、モニター手法を確立し温度及び圧力波等の実験解析が入射陽子あたりで規格化できるようになった。
  • 春日井 好己, 高田 弘, 明午 伸一郎, 前川 藤夫, 中島 宏, 池田 裕二郎, 猪野 隆, 佐藤 節夫, Jerde, E, Glasgow, D
    JAERI-Data/Code 2000-042 1 - 62 2001年02月 [査読無し][通常論文]
     
    ASTE (AGS Spallation Target Experiment)共同実験の一環として、ブルックヘブン国立研究所のAGS加速器を使って、鉛反射対及び軽水減速材付き水銀ターゲットからGeV領域の陽子入射によって発生する核破砕中性子の特性を実験的に調べた。入射陽子のエネルギー1.94,12及び24GeVについて、水銀ターゲットに沿った位置における種々の反応率を放射化法で測定した。放射化検出器としては、インジウム,ニオブ,アルミニウム,コバルト及びビスマスを用い、0.33~4.09MeVのしきいエネルギーをカバーした。本レポートは、実験方法及びすべての実験結果をまとめたものである。
  • Development of DUCT-III code for duct streaming calculation up to 3 GeV
    H Nakano, R Tayama, T Tsukiyama, H Handa, K Hayashi, K Shin, H Hirayama, H Nakashima, F Masukawa, N Sasamoto, Y Sakamoto, K Yamada, T Abe
    SHIELDING ASPECTS OF ACCELERATORS, TARGETS AND IRRADIATION FACILITIES 371 - 381 2001年 [査読有り][通常論文]
     
    A simple and useful code for radiation streaming calculations known as DUCT-III, equipped with updated high-energy albedo data up to 3 GeV, has been developed. DUCT-III can treat cylindrical duct, rectangular duct, annulus and slit geometry. Multi-legged geometry is also available. As an output, we can obtain energy spectra at many positions along the duct centre axis. We performed benchmark analyses with neutron streaming experiments at TIARA and NIMROD to validate the applicability of DUCT-III. The results were in agreement with the experiments for neutron dose equivalents and reaction rates with activation detectors. Therefore, the applicability of DUCT-III to the shielding design work of high-energy neutron facilities was validated.
  • M Baba, T Sanami, Y Nauchi, Y Hirasawa, N Hirakawa, H Nakashima, S Meigo, S Tanaka
    REACTOR DOSIMETRY: RADIATION METROLOGY AND ASSESSMENT 1398 1398 447 - 454 2001年 [査読有り][通常論文]
     
    Differential cross sections have been measured for the O-16(n,x alpha) reaction between 11.5 and 15 MeV using a gridded-ionization chamber with gas samples, and the Fe, Ni(n,xp), (n.xd). (n,x alpha) reactions at 55 and 75 MeV using a Li-7(p,n) source and multiple counter telescopes. The results were favorably compared with ENDF/B-VI, JENDL-3.2, and LA-150 library, but in marked disagreement in some cases.
  • Characterization of a 40-90 MeV Li-7(p,n) neutron source at TIARA using a proton recoil telescope and a TOF method
    M Baba, Y Nauchi, T Iwasaki, T Kiyosumi, M Yoshioka, S Matsuyama, N Hirakawa, T Nakamura, S Tanaka, S Meigo, H Nakashima, S Tanaka, N Nakao
    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 428 2-3 454 - 465 1999年06月 [査読有り][通常論文]
     
    The intensity and energy spectra of a quasi-monoenergetic Li-7(p,n) neutron source at TIARA of Japan Atomic Energy Research Institute (JAERI) have been measured for eight incident proton energies between 43 and 87 MeV, using a proton recoil telescope (PRT) of annular geometry and a time-of-flight (TOF) method employing organic scintillators (BC501A, NE213) calibrated prior to the experiment. By combining the two data, we deduced energy spectra of the source neutrons absolutely down to a few MeV, and the cross section of the peak neutron production reaction, Li-7(p,n(0,1))Be-7. The continuum component of the energy spectrum in the source proved to be described consistently by assuming a three-body phase-space distribution corresponding to the Li-7(p,n(3)He)alpha reaction as a main component. The annular PRT achieved a good compromise between energy resolution and detection efficiency with a good signal-to-noise ratio. (C) 1999 Elsevier Science B.V. All rights reserved.
  • Y Nauchi, M Baba, T Sanami, M Ibaraki, T Iwasaki, N Hirakawa, S Tanaka, S Meigo, H Nakashima, H Takada, T Nakamura, Y Watanabe
    JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY 36 2 143 - 151 1999年02月 [査読有り][通常論文]
     
    Double differential (n, xp), (n, xd) cross sections of carbon and aluminum were measured for 65 and 75 MeV neutrons at angles between 12 degrees and 70 degrees using Delta E-E telescopes at a Li-7(p, n) neutron source facility at TIARA. The data at 12 degrees were obtained by employing an annular geometry. The telescopes consisting of SSD and NaI(Tl) scintillator, experimental methods and the data reduction procedures are presented as well as the results. The carbon data are compared favorably with existing experimental data. The (n, xp) spectra of both carbon and aluminum agreed fairly well with theoretical calculations based on the intra-nuclear cascade model and the multi-step Hauser-Feshbach model including preequilibrium effects, but the (n, xd) spectra differ significantly from those calculations.
  • Kawano T, Sanami T, Baba M, Nakashima H
    Journal of Nuclear Science and Technology 36 3 256 - 264 1999年 [査読有り][通常論文]
  • 大山 幸夫, 馬場 護, 渡辺 幸信, 河野 俊彦, 沼尻 正晴, 植木 絋太郎, 小田野 直光, 山野 直樹, 小迫 和明, 林 克己, 義澤 宣明, 中島 宏, 田中 進, 前川 藤夫, 今野 力, 深堀 智生, 千葉 敏, 長谷川 明
    JAERI-Review 98-020 1 - 130 1998年11月 [査読無し][通常論文]
     
    シグマ委員会では近年の加速器利用の進展に伴い、基礎研究、放射性廃棄物の消滅処理研究、核融合炉材料研究、医学診断・治療研究など多岐に渡る分野において共通の基礎データである中高エネルギー領域核データの整備を目的として、JENDL High Energy File(JENDL-HE)の整備作業を実施してきた。一方、そのデータレビュー及び積分テスト手法が未確立であり、JENDL-HEの利用を促すためにも積分的検証が必須である。このため、シグマ委員会ではJENDL-HEに関する積分評価のためのタスクフォースを設置し、問題点の現状を調査・検討し、今後のシグマ委員会における中高エネルギー核データ評価及び整備に対する指針を得ることを目的として調査活動を実施した。本報告書は本タスクフォースの調査検討結果をまとめたものであり、シグマ委員会に対する報告を行うものである。
  • Fission Reaction Rate Distribution of Np-237 in Polyethylene system for 65 MeV Neutron
    Tomohiko Iwasaki, Yoshimasa Sakuya, Naohiro Hirakawa, Yukio Sakamoto, Hiroshi Nakashima, Susumu Tanaka
    Int. Conf. on Future Nuclear Systems, October5-10,1997,Yokohama, Japan 794 - 799 1997年10月 [査読有り][通常論文]
  • Responses and glow curves of Li2B4O7 : Cu, BeO and CaSO4 : Tm TLDs to 10-40 keV monoenergetic photons from synchrotron radiation
    N Nariyama, S Tanaka, Y Nakane, Y Asano, H Hirayama, S Ban, H Nakashima, Y Namito
    RADIATION PROTECTION DOSIMETRY 74 3 155 - 161 1997年 [査読有り][通常論文]
     
    Energy and dose responses of Li2B4O7:Cu, BeO and CaSO4:Tm TLDs were obtained from the glow curves measured for 10-40 keV monoenergetic photons from synchrotron radiation. The energy responses of Li2B4O7:Cu were 8% to 20% smaller than the ratios of the mass energy absorption coefficients of the TLD to those of air. The dose response was linear up to 650 Gy for Co-60 gamma rays and 300 Gy for 10 keV X rays, which was followed by saturation. On the other hand, the energy responses of BeO and CaSO4:Tm became larger than calculated by 70% and 8% to 24%, respectively. For BeO, the glow curves were independent of photon energy, while for CaSO4:Tm the ratio of the high temperature peaks was slightly larger for the low energy X rays than Co-60 gamma rays. Furthermore, in the supralinear region the ratio increased with dose for CaSO4:Tm, showing that the growth rate and the dose responses were larger for Co-60 gamma rays compared with those for the low energy X rays.
  • Measurements of neutron spectra from stopping-length targets irradiated by 68-MeV protons, 100-MeV alpha and 220-MeV carbon particles
    S Meigo, H Takada, H Nakashima, T Sasa, S Tanaka, K Shin, S Ono
    INTERNATIONAL CONFERENCE ON NUCLEAR DATA FOR SCIENCE AND TECHNOLOGY, VOL 59, PT 1 AND 2 59 413 - 415 1997年 [査読有り][通常論文]
  • Quasi-monoenergetic neutron fields for neutron cross section and shielding experiments in the energy range of 20 to 200MeV
    T Nakamura, M Takada, N Nakao, M Baba, T Iwasaki, H Nakashima, S Tanaka, S Meigo, Y Sakamoto, Y Nakane, S Tanaka, Y Uwamino, N Nakanishi
    INTERNATIONAL CONFERENCE ON NUCLEAR DATA FOR SCIENCE AND TECHNOLOGY, VOL 59, PT 1 AND 2 59 1508 - 1512 1997年 [査読有り][通常論文]
  • Transmission through shields of quasi-monoenergetic neutrons generated by 43- and 68-MeV protons .1. Concrete shielding experiment and calculation for practical application
    N Nakao, H Nakashima, T Nakamura, S Tanaka, S Tanaka, K Shin, M Baba, Y Sakamoto, Y Nakane
    NUCLEAR SCIENCE AND ENGINEERING 124 2 228 - 242 1996年10月 [査読有り][通常論文]
     
    The energy spectra of neutrons that penetrate 25- to 200-cm-thick concrete shields are measured using 40- and 65-MeV quasi-monoenergetic neutron sources at the 90-MeV AVF cyclotron of the Takasaki ion Accelerator Facility for Advanced Radiation Application at the Japan Atomic Energy Research Institute. Source neutrons are produced at 3.6- and 5.2-mm-thick Li-7 targets bombarded by 43- and 68-MeV protons, respectively, and their spectra are measured with a proton recoil counter telescope and the time-of-flight method. In the shielding experiment, a BC501A organic liquid scintillator and a multimoderator spectrometer with a He-3 counter (the Bonner Ball) are used as the neutron spectrometer. The collimated source neutrons are used to obtain the neutron spectra with the unfolding technique on the neutron beam axis and at off-center positions. MORSE Monte Carlo calculations are performed with the DLCl 19/HILO86 multigroup cross-section library for comparison with the measured data on the beam axis. The comparison reveals that the calculated spectra are in good agreement with the measured spectra. The measured data at off-center positions are used to check the calculational accuracy of the angular distribution of neutron scattering in the MORSE-CG, DOT3.5 discrete ordinates, and HETC-KFA2 Monte Carlo codes. The MORSE-CG code gives better results than the other two codes.
  • H Nakashima, N Nakao, S Tanaka, T Nakamura, K Shin, S Tanaka, H Takada, S Meigo, Y Nakane, Y Sakamoto, M Baba
    NUCLEAR SCIENCE AND ENGINEERING 124 2 243 - 257 1996年10月 [査読有り][通常論文]
     
    Neutron spectra in the energy range above 10(-4) eV transmitted through iron shields succeedingly are measured with a BC501A liquid scintillation detector and the Bonner Ball detector using quasi-monoenergetic neutron sources generated via the Li-7(p, n) reaction by 43- and 68-MeV protons. Using the collimated source neutrons, the spectra are obtained on the neutron beam axis and at off-center positions. The calculations using the MORSE-CG and DOT3.5 codes with the DLC119 group cross-section data sets as well as the HETC-KFA2 code are carried out and compared with the measurements. The spectra calculated with the Monte Carlo code MORSE-CG and the DLC119 data agree with the measurements on the whole in the energy region above a few mega-electron-volts. It, however, is found that a few orders of Legendre expansion fail to reproduce the measurements at the position dominated by the neutrons scattered at a large angle. The calculations with the two-dimensional discrete ordinates code DOT3.5 and the DLC119 data also agree with the measurements in the overall energy region, though the restricted numbers of angular quadrature and a few orders of Legendre expansion led to the disagreement with the measurements at the off-center positions or in the neutron peak energy region. The comparison among the calculations with the Monte Carlo code HETC-KFA2 and the measurements show that the contribution of elastic scattering is very important in the intermediate energy region, and the treatment of the angular distribution of the elastic scattering reaction in the HETC-KFAZ code should be modified.
  • Li7(p,n)中性子源の特性測定
    馬場護, 岩崎智彦, 清住武秀, 名内泰志, 吉岡正博, 松山成男, 中村尚司, 田中進, 中島宏, 明午伸一郎, 田中俊一, 中尾徳晶
    原子核研究 41 3 3 - 7 1996年06月 [査読無し][通常論文]
  • Measurement of reaction rate distributions in phantom irradiated by intermediate energy neutrons for effective dose evaluation
    Y Nakane, H Nakashima, Y Sakamoto, S Tanaka
    IRPA9 - 1996 INTERNATIONAL CONGRESS ON RADIATION PROTECTION / NINTH INTERNATIONAL CONGRESS OF THE INTERNATIONAL RADIATION PROTECTION ASSOCIATION, PROCEEDINGS, VOL 4 D343 - D345 1996年 [査読有り][通常論文]
     
    Reaction rate distributions in a plastic phantom irradiated by 41- and 64-MeV quasi-monoenergetic neutrons were measured with a U-238 fission counter and solid state nuclear track detectors. Measured distributions were compared with those calculated by using the HERMES code system.
  • Survey of thick target neutron yield data and accelerator shielding experiments
    K Hayashi, Y Sakamoto, T Nakamura, S Tanaka, S Tanaka, N Sasamoto, H Nakashima, Y Asano, Y Nakane, K Kawachi, Y Uwamino, H Hirayama, S Ban, Y Namito, N Otani, K Shin, N Yamano, M Kawai, Y Hayashida, M Uematsu, Y Suzuoki, S Iwai, T Kubota, O Sato, S Takagi, K Mio, H Ida, M Shimizu, A Oishi, A Hara, M Kinno, T Ishikawa, K Kanai, N Odano, Y Harima, T Ichimiya
    PROCEEDINGS OF SECOND SPECIALISTS' MEETING ON SHIELDING ASPECTS OF ACCELERATORS, TARGETS AND IRRADIATION FACILITIES 41 - 54 1996年 [査読有り][通常論文]
  • Measurement of glass dosimeter response for low energy photon using synchrotron radiations
    Y Asano, N Sasamoto, Y Nakane, H Nakashima, Y Sakamoto, S Tanaka, Y Namito, S Ban, H Hirayama, N Nariyama
    IRPA9 - 1996 INTERNATIONAL CONGRESS ON RADIATION PROTECTION / NINTH INTERNATIONAL CONGRESS OF THE INTERNATIONAL RADIATION PROTECTION ASSOCIATION, PROCEEDINGS, VOL 4 D253 - D255 1996年 [査読有り][通常論文]
  • Instrumentation and dosimetry at accelerator facilities
    T Nakamura, T Kurosawa, E Kim, M Takada, A Konno, Y Uwamino, M Imamura, N Nakao, T Shibata, S Shibata, N Nakanishi, N Tsujimura, T Yamano, H Ohguchi, M Baba, T Iwasaki, S Matsuyama, H Nakashima, S Tanaka, S Meigo, Y Sakamoto, Y Nakane, S Tanaka
    IRPA9 - 1996 INTERNATIONAL CONGRESS ON RADIATION PROTECTION / NINTH INTERNATIONAL CONGRESS OF THE INTERNATIONAL RADIATION PROTECTION ASSOCIATION, PROCEEDINGS, VOL 1 A123 - A130 1996年 [査読有り][通常論文]
  • Accelerator shielding benchmark experiment analyses
    H Nakashima, H Takada, S Meigo, F Maekawa, T Fukahori, S Chiba, Y Sakamoto, N Sasamoto, S Tanaka, K Hayashi, N Odano, N Yoshizawa, O Sato, Y Suzuoki, S Iwai, T Uehara, H Takahashi, Y Uwamino, Y Namito, S Ban, H Hirayama, K Shin, T Nakamura
    PROCEEDINGS OF SECOND SPECIALISTS' MEETING ON SHIELDING ASPECTS OF ACCELERATORS, TARGETS AND IRRADIATION FACILITIES 115 - 145 1996年 [査読有り][通常論文]
  • CHARACTERISTICS OF A VACUUM-TYPE MICROCALORIMETER FOR SYNCHROTRON-RADIATION MEASUREMENTS
    H NAKASHIMA, Y NAKANE, Y SAKAMOTO, Y ASANO, SI TANAKA, S BAN, Y NAMITO, H HIRAYAMA, N NARIYAMA
    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 365 2-3 553 - 558 1995年11月 [査読有り][通常論文]
     
    A previously developed total-absorption calorimeter was improved by replacing a thermostated air bath by a vacuum chamber in order to reduce the applicable photon energy up to several keV, and to extend the measurable photon intensity up to about 10 W of synchrotron radiation. The calorimeter maintained linearity over the power range from about 10 mu W to a few W within 0.1%. Experiments with monoenergetic and white-spectrum photons have proven the designed performance, in which the heat power due to monoenergetic photons was measured within an uncertainty of 3%, and the heat power due to white-spectrum photons was up to about 2 W.
  • COMPTON-SCATTERING OF 20-KEV TO 40-KEV PHOTONS
    Y NAMITO, S BAN, H HIRAYAMA, N NARIYAMA, H NAKASHIMA, Y NAKANE, Y SAKAMOTO, N SASAMOTO, Y ASANO, S TANAKA
    PHYSICAL REVIEW A 51 4 3036 - 3043 1995年04月 [査読有り][通常論文]
  • ABSORBED DOSE MEASUREMENTS AND CALCULATIONS IN PHANTOMS FOR 1.5-KEV TO 50-KEV PHOTONS
    N NARIYAMA, S TANAKA, Y NAKANE, Y NAMITO, H HIRAYAMA, S BAN, H NAKASHIMA
    HEALTH PHYSICS 68 2 253 - 260 1995年02月 [査読有り][通常論文]
     
    Monte Carlo code EGS4 expanded for low energy photon transport was validated by measuring absorbed doses in a phantom for 30 and 10 keV monoenergetic photons from synchrotron radiation. Using the EGS4 code, depth doses at 0.07 mm, 0.02 to 0.1 mm, and 10 mm in the ICRU slab phantoms were calculated for 1.5 to 50 keV photons using the updated photon cross section data PHOTX. The results show that the doses at 0.02 to 0.1 mm below 10 keV are practical indices of effective dose as calculated by others, based on the 1990 ICRP recommendations (1991).
  • S BAN, H HIRAYAMA, Y NAMITO, S TANAKA, H NAKASHIMA, Y NAKANE, N NARIYAMA
    JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY 31 2 163 - 168 1994年02月 [査読有り][通常論文]
     
    Silicon PIN photodiodes -ere used to measure the absolute intensity of monoenergetic photons in a synchrotron radiation beam line at 7-40 keV region. Below 20 keV, the intensity was measured with an accuracy of 5%. Above this energy, the accuracy was about 20% because the photocurrent in the sensitive area was not uniform due to backscattered radiation from backing.
  • Characterization and Application of 20-90 MeV Li-7(p,n) Neutron Source at TIARA
    M.Baba, T.Kiyosumi, T.Iwasaki, M.Yoshioka, S.Matsuyama, N.Hirakawa, T.Nakamura, Susumu Tanaka, R.Tanaka, Shun-ichi Tanaka, H.Nakashima, S.Meig
    JAERI-M 94-019 200 - 209 1994年02月 [査読無し][通常論文]
  • MEASUREMENT OF THE PHOTON ENERGY-ABSORPTION COEFFICIENT FOR AIR, NITROGEN AND ARGON AT 30-KEV
    S BAN, H HIRAYAMA, Y NAMITO, S TANAKA, H NAKASHIMA, Y NAKANE, M YOSHIZAWA, N NARIYAMA
    APPLIED RADIATION AND ISOTOPES 44 4 769 - 772 1993年04月 [査読有り][通常論文]
     
    A parallel plate free-air ionization chamber was filled with air, nitrogen and argon, and the ionization current was measured for 30-keV monoenergetic incident photons, using a synchrotron radiation source. The photon intensity was measured using a total absorption calorimeter placed behind the chamber. Because the W value for each gas is accurately known, photon mass energy-absorption coefficients for each gas were measured. The measured coefficients are in agreement with published tables by Hubbell within 2%.
  • RESPONSES OF LIF TLDS TO 10-40 KEV MONOENERGETIC PHOTONS FROM SYNCHROTRON-RADIATION
    N NARIYAMA, S TANAKA, M YOSHIZAWA, H HIRAYAMA, S BAN, H NAKASHIMA, Y NAMITO, Y NAKANE
    RADIATION PROTECTION DOSIMETRY 49 4 451 - 457 1993年 [査読有り][通常論文]
     
    Glow curves of LiF TLDs (TLD-100) were measured for 10-40 keV monoenergetic photons from synchrotron radiation, and the energy and dose responses were evaluated based on the glow curve data. The ratio of measured to calculated energy response was almost unity for the lower temperature region of the glow curve including the main peak, and was about 2.0 for the higher one. Dose responses to 10 keV 30 keV X rays, and Co-60 gamma rays showed different supralinearity. The maximum Value of supralinearity decreased with decreasing photon energy, that is, with increasing the average linear energy transfer of incident photons.
  • DEVELOPMENT OF A MICROCALORIMETER FOR MEASURING ABSOLUTE INTENSITY OF SYNCHROTRON RADIATION
    H NAKASHIMA, S TANAKA, M YOSHIZAWA, H HIRAYAMA, S BAN, Y NAMITO, N NARIYAMA
    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 310 3 696 - 702 1991年12月 [査読有り][通常論文]
     
    A total absorption calorimeter was developed to measure the absolute intensity of monoenergetic X-ray beams from 10 keV to 70 keV of synchrotron radiation. Experiments with synchrotron radiation have demonstrated that the heat power above about 1-mu-W due to monoenergetic synchrotron radiation is measured with an accuracy of about 1%.
  • EXPERIMENT AND ANALYSIS OF THE BEHAVIOR OF 14-MEV NEUTRONS IN A LARGE CAVITY
    H NAKASHIMA, S TANAKA, T SUZUKI
    FUSION TECHNOLOGY 16 3 365 - 376 1989年11月 [査読有り][通常論文]
  • EXPERIMENT AND ANALYSIS OF 14 MEV NEUTRON DEEP PENETRATION IN A TYPE-316L STAINLESS-STEEL ASSEMBLY
    H NAKASHIMA, S TANAKA, Y OYAMA, N SASAMOTO, T SUZUKI
    FUSION ENGINEERING AND DESIGN 10 121 - 125 1989年06月 [査読有り][通常論文]
  • H NAKASHIMA, S TANAKA, H MAEKAWA
    JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY 24 8 601 - 609 1987年08月 [査読有り][通常論文]
  • S CHIBA, M BABA, H NAKASHIMA, M ONO, N YABUTA, S YUKINORI, N HIRAKAWA
    JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY 22 10 771 - 787 1985年 [査読有り][通常論文]

書籍

その他活動・業績

  • Satoshi Sato, Chikara Konno, Hiroshi Nakashima, Ryosuke Shionaga, Hiroyuki Nose, Yuji Ito, Hirohide Hashimoto JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY 55 (4) 410 -417 2018年 [査読有り][通常論文]
     
    In order to enhance the neutron-shielding performance of concrete in neutron-generation facilities from the viewpoint of reduction of effective dose rates in operation and radioactive wastes in decommission, we developed concrete with boron of more than 10 wt%. We performed a neutron-shielding experiment using the mockup of the newly developed boron-loaded concrete and Deuterium Tritium (DT) neutrons at the Fusion Neutronics Source in the Japan Atomic Energy Agency, and measured the reaction rates of Nb-93(n, 2n)Nb-92m and Au-197(n,gamma)Au-198 reactions in the mockup. The calculations were conducted using MCNP-5.14 and FENDL-2.1. The calculation results agreed well with the measured ones, and we confirmed that the accuracy was very good on the atomic composition data of boron-loaded concrete and their nuclear data. In addition, we calculated the neutron and photon effective dose rates and reaction rates of Co-59(n,gamma)Co-60 and Eu-151(n,gamma)Eu-152 reactions, which produce critical radioisotopes in decommission, in boron-loaded concrete and other concretes with DT neutrons, and the experimental condition presently used. The dose rates and reaction rates were drastically reduced by using boron-loaded concrete and it was concluded that boron-loaded concrete had very good shielding performance for DT neutrons.
  • 桐原陽一, 糸賀俊朗, 佐波俊哉, 佐波俊哉, 佐波俊哉, 中島宏, 中島宏, 波戸芳仁, 波戸芳仁, 宮本修治, 武元亮頼, 山口将志, 浅野芳裕, 浅野芳裕 日本原子力学会秋の大会予稿集(CD-ROM) 2016 ROMBUNNO.1N07 2016年08月26日 [査読無し][通常論文]
  • 糸賀俊朗, 中島宏, 中島宏, 桐原陽一, 佐波俊哉, 佐波俊哉, 佐波俊哉, 波戸芳仁, 波戸芳仁, 岩瀬広, 岩瀬広, 宮本修治, 武元亮頼, 山口将志, 浅野芳裕, 浅野芳裕 日本原子力学会春の年会予稿集(CD-ROM) 2016 ROMBUNNO.2J04 2016年03月16日 [査読無し][通常論文]
  • Hideo Hirayama, Hiroshi Nakashima, Makoto Morishima, Mikio Uematsu, Osamu Sato JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY 52 (11) 1339 -1361 2015年11月 [査読無し][通常論文]
     
    Progress in calculation methods for radiation shielding are reviewed based on the activities of research committees related to radiation shielding fields established in the Atomic Energy Society of Japan. A technological roadmap for the field of radiation shielding; progress and prospects for specific shielding calculation methods such as the Monte Carlo, discrete ordinate Sn transport, and simplified methods; and shielding experiments used to validate calculation methods are presented in this paper.
  • 国枝賢, 岩本修, 岩本信之, 湊太志, 岡本力, 佐藤達彦, 中島宏, 岩元洋介, 岩元大樹, 北谷文人, 深堀智生, 渡辺幸信, 執行信寛, 千葉敏, 山野直樹, 萩原雅之, 仁井田浩二, 小迫和明, 平山嵩祐, 村田徹 日本原子力学会秋の大会予稿集(CD-ROM) 2015 ROMBUNNO.O21 2015年08月21日 [査読無し][通常論文]
  • 熊田博明, 榮武二, 櫻井英幸, 松村明, 吉岡正和, 小林仁, 松本浩, 栗原俊一, 中島宏, 中村剛実, 池田直昭, 菅野東明, 柱野竜臣, 立木智裕 日本原子力学会春の年会予稿集(CD-ROM) 2015 ROMBUNNO.TN12 2015年03月05日 [査読無し][通常論文]
  • 奥村慎太郎, 関本俊, 八島浩, 松四雄騎, 松崎浩之, 松村宏, 豊田晃弘, 大石晃嗣, 松田規宏, 春日井好己, 坂本幸夫, 中島宏, BOEHNLEIN D, COLEMAN R, LAUTEN G, LEVELING A, MOKHOV N, RAMBERG E, SOHA A, VAZIRI K, 二宮和彦, 嶋達志, 高橋成人, 篠原厚, CAFFEE M. W, 西泉邦彦, 柴田誠一, 大槻勤 KURRI KR (200) 54 2015年01月 [査読無し][通常論文]
  • 中村剛実, SAKASAI Kaoru, NAKASHIMA Hiroshi, TAKAMIYA Koichi 医学物理 Supplement 34 (1) 199 2014年04月01日 [査読無し][通常論文]
  • OISHI Koji, KOSAKO Kazuaki, KASUGAI Yoshimi, MATSUDA Norihiro, YASHIMA Hiroshi, SEKIMOTO Shun, MATSUMURA Hiroshi, TOYODA Akihiro, IWASE Hiroshi, MOKHOV Nikolai, LEVELING Anthony, BOEHNLEIN David, VAZIRI Kamran, NAKASHIMA Hiroshi, SAKAMOTO Yukio Prog Nucl Sci Technol (Web) 4 197-200 (WEB ONLY) 2014年04月 [査読無し][通常論文]
  • TOYODA Akihiro, MATSUMURA Hiroshi, MASUMOTO Kazuyoshi, SEKIMOTO Shun, YASHIMA Hiroshi, MATSUDA Norihiro, KASUGAI Yoshimi, SAKAMOTO Yukio, NAKASHIMA Hiroshi, LAUTEN Gary, LEVELING Anthony, MOKHOV Nikolai, VAZIRI Kamran, OISHI Koji, KUROYANAGI Makoto, NOBUHARA Fumiyoshi, TAKAHASHI Katsuhiko Prog Nucl Sci Technol (Web) 4 384-387 (WEB ONLY) 2014年04月 [査読無し][通常論文]
  • 佐藤達彦, 松田規宏, 橋本慎太郎, 岩元洋介, 古田琢哉, 野田秀作, 小川達彦, 中島宏, 深堀智生, 奥村啓介, 甲斐哲也, 仁井田浩二, 岩瀬広 日本原子力学会春の年会予稿集(CD-ROM) 2014 ROMBUNNO.J27 2014年03月10日 [査読無し][通常論文]
  • 佐藤達彦, 仁井田浩二, 松田規宏, 橋本慎太郎, 岩元洋介, 古田琢哉, 岩瀬広, 野田秀作, 小川達彦, 中島宏, 深堀智生, 奥村啓介, 甲斐哲也 応用物理学会春季学術講演会講演予稿集(CD-ROM) 61st ROMBUNNO.17P-E12-3 2014年03月03日 [査読無し][通常論文]
  • 小林仁, 栗原俊一, 吉岡正和, 松本浩, 松本教之, 熊田博明, 櫻井英幸, 田中進, 松村明, 菅野東明, 柱野竜臣, 中島宏, 中村剛実, 平賀富士夫, 大場俊幸, 小林創, 名倉信明, 黒川真一, 中本崇志, ZAGAR Tilen 日本加速器学会年会(Web) 11th SAOLP4 (WEB ONLY) 2014年 [査読無し][通常論文]
  • 豊田晃弘, 桝本和義, 松村宏, 関本俊, 八島浩, 松田規宏, 春日井好己, 坂本幸夫, 中島宏, LAUTEN Gary, LEVELING Anthony, MOKHOV Nikolai, VAZIRI Kamran, 大石晃嗣, 畔柳誠, 延原文祥, 高橋克彦 KEK Proceedings (Web) (2013-3) 2012,8‐12 (WEB ONLY) 2013年09月 [査読無し][通常論文]
  • 佐藤達彦, 仁井田浩二, 松田規宏, 橋本慎太郎, 岩元洋介, 野田秀作, 小川達彦, 中島宏, 深堀智生, 奥村啓介, 甲斐哲也, 岩瀬広, 古田琢哉, 千葉敏 RIST News (54) 14 -24 2013年01月25日 [査読無し][通常論文]
  • 吉岡正和, 栗原俊一, 小林仁, 松本浩, 松本教之, 熊田博明, 櫻井英幸, 田中進, 松村明, 菅野東明, 柱野竜臣, 中島宏, 中村剛実, 鬼柳善明, 平賀富士夫, 大場俊幸, 岡崎浩二 日本加速器学会年会(Web) 10th MOOS16 (WEB ONLY) 2013年 [査読無し][通常論文]
  • 平山英夫, 中島宏, 佐波俊哉, 山口恭弘, 佐藤理, 高木俊治, 鈴木敏和, 岩井敏 KEK Prepr (Web) (2012-44) WEB ONLY 2013年01月 [査読無し][通常論文]
  • 橋本 慎太郎, 深堀 智生, 古田 琢哉, 千葉 敏, 仁井田 浩二, 松田 規宏, 岩元 洋介, 岩瀬 広, 佐藤 達彦, 野田 秀作, 小川 達彦, 中島 宏 医学物理 33 (2) 88 -95 2013年 [査読無し][通常論文]
     
    PHITS is a general purpose Monte Carlo particle transport simulation code to analyze the transport in three-dimensional phase space and collisions of nearly all particles, including heavy ions, over wide energy range up to 100 GeV/u. Various quantities, such as particle fluence and deposition energies in materials, can be deduced using estimator functions “tally”. Recently, a microdosimetric tally function was also developed to apply PHITS to medical physics. Owing to these features, PHITS has been used for medical applications, such as radiation therapy and protection.
  • 熊田博明, 松村明, 櫻井英幸, 榮武二, 吉岡正和, 小林仁, 松本浩, 鬼柳善明, 平賀富士夫, 柴田徳思, 中島宏 医学物理 Supplement 32 (3) 19 -20 2012年09月13日 [査読無し][通常論文]
  • 熊田博明, 松村明, 櫻井英幸, 榮武二, 吉岡正和, 小林仁, 松本浩, 中島宏, 鬼柳善明 医学物理 Supplement 32 (1) 197 2012年04月01日 [査読無し][通常論文]
  • 佐藤達彦, 佐藤大樹, 遠藤章, 萩原雅之, 増川史洋, 中島宏 日本保健物理学会研究発表会講演要旨集 44th 1 2011年10月17日 [査読無し][通常論文]
  • 萩原雅之, 佐波俊哉, 松田規宏, 中根佳弘, 岩元洋介, 中島宏, 坂本幸夫, 桝本和義, 上蓑義朋 日本原子力学会秋の大会予稿集(CD-ROM) 2011 ROMBUNNO.J52 2011年09月02日 [査読無し][通常論文]
  • 梶本剛, 執行信寛, 石橋健二, 岩元洋介, 坂本幸夫, 中島宏, 萩原雅之, 佐波俊哉, LEE Hee‐Seock, BOEHNLEIN David J, COLEMAN Richard, JENSEN Doug, LEVELING Anthony, MOKHOV Nikolai V, RAMBERG Eric, SOHA Aria, VAZIRI Kamran 日本原子力学会秋の大会予稿集(CD-ROM) 2011 ROMBUNNO.J53 2011年09月02日 [査読無し][通常論文]
  • 爲重雄司, 前田嘉一, 佐々木誠, 前川素一, 清水康弘, 佐藤大樹, 中島宏, 遠藤章, 柴田徳思, 津田修一, 山崎正晴, 片寄雅 日本原子力学会春の年会予稿集(CD-ROM) 2011 ROMBUNNO.M26 2011年03月11日 [査読無し][通常論文]
  • 佐藤大樹, 中島宏, 柴田徳思, 遠藤章, 津田修一, 爲重雄司, 前田嘉一, 佐々木誠, 前川素一, 清水康弘, 山崎正晴, 片寄雅 日本原子力学会春の年会予稿集(CD-ROM) 2011 ROMBUNNO.M27 2011年03月11日 [査読無し][通常論文]
  • 岩瀬広, 松田規宏, 春日井好己, 八島浩, 松村宏, 佐波俊哉, 木下哲一, 大石晃嗣, 中村尚司, 中島宏 日本原子力学会春の年会予稿集(CD-ROM) 2011 ROMBUNNO.M50 2011年03月11日 [査読無し][通常論文]
  • 萩原雅之, 佐波俊哉, 岩元洋介, 松田規宏, 中島宏, 坂本幸夫 日本原子力学会春の年会予稿集(CD-ROM) 2011 ROMBUNNO.M01 2011年03月11日 [査読無し][通常論文]
  • 梶本剛, 執行信寛, 石橋健二, 岩元洋介, 中島宏, 萩原雅之, 齋藤究, 佐波俊哉, LEE Hee‐Seock, RAMBERG Eric, COLEMAN Richard, JENSEN Doug, MEYHOEFER Aria, MOKHOV Nikolai V, LEVELING Anthony F, BOEHNLEIN David J, VAZIRI Kamran 日本原子力学会春の年会予稿集(CD-ROM) 2011 ROMBUNNO.M03 2011年03月11日 [査読無し][通常論文]
  • Neutron yields for reactions induced by 120 GeV protons on thick copper target
    Tsuyoshi Kajimoto, Toshiya Sanami, Yosuke Iwamoto, Nobuhiro Shigyo, Masayuki Hagiwara, Kiwamu Saitoh, Hiroshi Nakashima, Kenji Ishibashi, Hee-Seock Lee, Eric Ramberg, Richard Coleman FERMILAB-CONF 2011年 [査読有り][通常論文]
  • 仲澤隆, 佐藤浩一, 高橋一智, 宮本幸博, 中島宏, 三浦太一, 春日井好己, 甲斐哲也, 大井元貴 日本放射線安全管理学会学術大会講演予稿集 9th 118 2010年12月01日 [査読無し][通常論文]
  • 関本俊, 八島浩, 長田直之, 沖雄一, 柴田誠一, 松村宏, 豊田晃弘, 大石晃嗣, 松田規宏, 春日井好己, 坂本幸夫, 中島宏, LEVELING Anthony, LAUTENSCHLAGER Gary, BOEHNLEIN David J, VAZIRI Kamran, MOKHOV Nikolai 日本放射化学会年会・放射化学討論会研究発表要旨集 2010-54th 121 2010年09月27日 [査読無し][通常論文]
  • 関本俊, 八島浩, 長田直之, 沖雄一, 柴田誠一, 松村宏, 豊田晃弘, 大石晃嗣, 松田規宏, 春日井好己, 坂本幸夫, 中島宏, LEVELING Anthony, LAUTENSCHLAGER Gary, BOEHNLEIN David J, VAZIRI Kamran, MOKHOV Nikolai 日本原子力学会秋の大会予稿集(CD-ROM) 2010 ROMBUNNO.H35 2010年08月27日 [査読無し][通常論文]
  • 松田規宏, 春日井好己, 坂本幸夫, 中島宏, 松村宏, 岩瀬広, 豊田晃弘, 八島浩, 関本俊, 大石晃嗣, MOKHOV Nikolai, LEVELING Anthony, BOEHNLEIN David, VAZIRI Kamran, GARY Lautenschlager, WAYNE Schmitt 日本原子力学会秋の大会予稿集(CD-ROM) 2010 ROMBUNNO.H34 2010年08月27日 [査読無し][通常論文]
  • 岩元洋介, 萩原雅之, 佐藤大樹, 岩瀬広, 八島浩, 糸賀俊朗, 佐藤達彦, 中根佳弘, 中島宏, 坂本幸夫, 松本哲郎, 増田明彦, 西山潤, 民井淳, 中村尚司 日本原子力学会秋の大会予稿集(CD-ROM) 2010 ROMBUNNO.H25 2010年08月27日 [査読無し][通常論文]
  • 萩原雅之, 佐波俊哉, 松田規宏, 中根佳弘, 岩元洋介, 中島宏, 坂本幸夫, 桝本和義, 上蓑義朋 日本原子力学会秋の大会予稿集(CD-ROM) 2010 ROMBUNNO.I04 2010年08月27日 [査読無し][通常論文]
  • 梶本剛, 執行信寛, 石橋健二, 岩元洋介, 中島宏, 萩原雅之, 齋藤究, 佐波俊哉, LEE Hee‐Seock, RAMBERG Eric, COLEMAN Richard, JENSEN Doug, MEYHOEFER Aria, MOKHOV Nikolai V, LEVELING Anthony F, BOEHNLEIN David J, VAZIRI Kamran 日本原子力学会秋の大会予稿集(CD-ROM) 2010 ROMBUNNO.I05 2010年08月27日 [査読無し][通常論文]
  • 萩原雅之, 岩瀬広, 岩元洋介, 佐藤大樹, 中根佳弘, 八島浩, 中村尚司, 中島宏, 坂本幸夫, 民井淳, 畑中吉治 日本原子力学会春の年会予稿集(CD-ROM) 2010 (0) ROMBUNNO.C40 -71 2010年03月09日 [査読無し][通常論文]
     
    高エネルギー加速器の放射線安全評価に重要な高エネルギー中性子の物質内挙動や遮へい効果に関する知見を得るため、大阪大学核物理研究センター(RCNP)において数100MeV準単色中性子を用いた遮へいベンチマーク実験を行っている。主な実験内容としては、Li(p,n)反応から生成される数100MeVの準単色中性子を様々な厚さの鉄、コンクリート遮へい体に入射させ、遮へい体透過後の中性子エネルギースペクトルを飛行時間分析(TOF)法やアンフォールディング法によって測定し、測定結果を様々なモンテカルロコードと比較を行うことである。この実験では様々な手法を用いたベンチマーク実験が行われているが、今回の発表では有機液体シンチレータを用いた遮へいベンチマーク実験に関して報告する。
  • 岩元 洋介, 坂本 幸夫, 松本 哲郎, 増田 明彦, 西山 潤, 中村 尚司, 民井 淳, 萩原 雅之, 佐藤 大樹, 岩瀬 広, 八島 浩, 糸賀 俊朗, 佐藤 達彦, 中根 佳弘, 中島 宏 日本原子力学会 年会・大会予稿集 2010 (0) 128 -128 2010年 [査読無し][通常論文]
     
    大阪大学核物理研究センター(RCNP)において、245MeV及び388MeVの7Li(p,n)反応を用いた準単色中性子の2MeV以上のエネルギースペクトルを飛行時間法により導出した。検出器には直径、厚さがそれぞれ5.08, 12.7cm, 25.4cmの3種類の液体有機シンチレータNE213を用いた。測定角度は0度から30度までの8角度である。スペクトルは高エネルギーの準単色中性子ピーク部と低エネルギーまでの連続部からなり、角度毎のピーク部と連続部の系統性をそれぞれ調べた。ピーク部の断面積の角度分布は、Taddeucciの経験式と良く一致した。
  • 松本 哲郎, 中村 尚司, 佐藤 達彦, 糸賀 俊朗, 中根 佳弘, 中島 宏, 坂本 幸夫, 増田 明彦, 原野 英樹, 西山 潤, 岩元 洋介, 萩原 雅之, 佐藤 大樹, 岩瀬 広, 八島 浩 日本原子力学会 年会・大会予稿集 2010 (0) 127 -127 2010年 [査読無し][通常論文]
     
    大阪大学核物理研究センターにおいて、7Li(p,n)反応によって得られる245MeV、388MeV準単色中性子を用いて鉄とコンクリートに対する遮蔽実験を行った。さまざまな厚さの鉄とコンクリートを透過して得られる中性子を、ポリエチレン、鉛、銅による6種類の減速材組み合わせと球形3He比例計数管で構成されるボナー球スペクトロメータによって測定した。MAXED及びGRAVEL計算コードによって、得られた測定結果をアンフォールディングし透過中性子のスペクトラルフルエンスを求めた。また、スペクトラルフルエンス結果から周辺線量当量を求め、遮蔽材厚さとの関係が得られた。
  • 増田 明彦, 中村 尚司, 佐藤 達彦, 糸賀 俊朗, 中根 佳弘, 中島 宏, 坂本 幸夫, 松本 哲郎, 原野 英樹, 西山 潤, 岩元 洋介, 萩原 雅之, 佐藤 大樹, 岩瀬 広, 八島 浩 日本原子力学会 年会・大会予稿集 2010 (0) 126 -126 2010年 [査読無し][通常論文]
     
    大阪大学核物理研究センターにおいて,7Li(p,n)反応によって得られる245MeV,388MeV準単色中性子を用いて,ボナー球スペクトロメータの高エネルギー中性子に対する応答測定を行った。使用したボナー球スペクトロメータはポリエチレン,鉛,銅による6種類の減速材の組み合わせと球形3He比例計数管で構成されている。応答は準単色場の低エネルギーテールの影響を差し引いて求められるが,その解析手法や,その結果によるモンテカルロシミュレーションコードによる応答関数の検証についても報告する。
  • 岩瀬 広, 中根 佳弘, 佐藤 達彦, 坂本 幸夫, 中島 宏, 民井 淳, 中村 尚司, 萩原 雅之, 岩元 洋介, 佐藤 大樹, 八島 浩, 松本 哲郎, 西山 潤, 増田 明彦, 糸賀 俊朗 日本原子力学会 年会・大会予稿集 2010 (0) 116 -116 2010年 [査読無し][通常論文]
     
    中性子の深層透過計算は放射線防護・保険物理の観点から重要である。PHITSコードは JENDL 断面積を用いる事で中性子の深層透過を精度良く計算する事が 135 MeVまでの中性子に対しこれまでの研究で分かった。さらに高エネルギーの中性子を用いた深層透過実験を大阪大学RCNPで行っている。中性子の深層透過は JENDL を使わずに核反応モデルで計算すると深さが増すにつれてモデル間の差が表れてくる。中性子の深層透過問題に関して、PHITSの核反応モデルを測定値と比較しながら評価する。
  • 佐波俊哉, 岩元洋介, 執行信寛, 萩原雅之, LEE Hee Seock, LEVELING Anthony, MOKHOV Nikolai, BOEHNLEIN David, VAZIRI Kamran, 坂本幸夫, 中島宏, 大石晃嗣 日本原子力学会秋の大会予稿集(CD-ROM) 2009 I33 2009年08月28日 [査読無し][通常論文]
  • 佐藤大樹, 岩元洋介, 佐藤達彦, 遠藤章, 坂本幸夫, 中根佳弘, 中島宏, 萩原雅之, 岩瀬広, 八島浩, 中村尚司, 民井淳, 畑中吉治 日本原子力学会春の年会予稿集(CD-ROM) 2009 (0) G10 -68 2009年03月06日 [査読無し][通常論文]
     
    大阪大学核物理研究センターにて、ピークエネルギー134MeVの準単色中性子ビームを用いた炭素原子核に対する中性子弾性散乱断面積の測定を行った。得られたデータを、評価済み核データ及び理論計算値と比較することにより、測定手法の妥当性を実証した。
  • 八島浩, 春日井好己, 松田規宏, 木下哲一, 松村宏, 岩瀬広, 中島宏, 坂本幸夫, 平山英夫, 石橋健二, 大石晃嗣, 中村尚司, 中村尚司, LEVELING Anthony, BOEHNLEIN David, KAMRAN Vaziri, MOKHOV Nikolai, GARY Lautenschlager, WAYNE Schmitt 日本原子力学会春の年会予稿集(CD-ROM) 2009 F35 2009年03月06日 [査読無し][通常論文]
  • 木下哲一, 松村宏, 岩瀬広, 八島浩, 春日井好己, 松田規宏, 中島宏, LEVELING Antony, MOKHOV Nikolai, BOEHNLEIN David, VAZIRI Kamran, CUPPS Vernon, BENESCH Steven, KERSHISNIK Bess, LAUTENSCHLAGER Gary, JOSEPH Joe, SCHMITT Wayne 日本原子力学会春の年会予稿集(CD-ROM) 2009 I49 2009年03月06日 [査読無し][通常論文]
  • Studies of muon-induced radioactivity at NuMI
    David j. Boehnlein, A.F. Leveling, N.V. Mokhov, K. Vaziri, Fermilab, Y. Iwamoto, Y. Kasugai, N. Matsuda, H. Nakashima, Y. Sakamoto, Ibaraki /JAEA, M. Hagiwara, Hiroshi Iwase, Tsukuba, Kyoto U, KEK, KURRI, Pohang Accelerator Lab, Shimizu, Tokyo, Tohoku U 2009年 [査読有り][通常論文]
  • 萩原 雅之, 佐波 俊哉, 岩元 洋介, 松田 規宏, 中根 佳弘, 中島 宏, 坂本 幸夫, 桝本 和義 日本原子力学会 年会・大会予稿集 2009 (0) 80 -80 2009年 [査読無し][通常論文]
     
    ポジトロン断層撮影法(PET)が普及し、その薬剤生成用の小型加速器が多くの病院等に設置されてきている。FDG薬剤の生成には主にO-18濃縮の水ターゲットが用いられており、O-18(p,n)F-18反応によりF-18を生成する。一方で、この反応は中性子も発生するため、施設の放射線安全設計やクリアランス評価にはターゲットからの中性子発生量や中性子による放射化量を適切に評価する必要がある。しかし、核データとしてその反応を見ると、評価済み核データはなく、入射陽子のエネルギーが20MeV以下の低エネルギー領域に関しては、計算コード(理論計算モデル)も十分に検証されていないのが現状である。本研究では、PET用小型加速器の安全設計やクリアランス評価のための基礎データとして、18MeV陽子によるO-18濃縮水からの生成中性子のエネルギー及び0°から120°までの角度分布データの測定を行った。
  • 萩原 雅之, 佐波 俊哉, 松田 規宏, 中根 佳弘, 岩元 洋介, 中島 宏, 坂本 幸夫, 桝本 和義 日本原子力学会 年会・大会予稿集 2009 (0) 44 -44 2009年 [査読無し][通常論文]
     
    ポジトロン断層撮影法(PET)が普及し、その薬剤生成用の小型加速器が多くの病院等に設置されてきている。そのPET用小型加速器の多くが最大加速エネルギー20MeV以下で運転される。施設の放射線安全設計や施設廃止措置後のクリアランス評価にはターゲットやビームダンプ等における加速器構造材からの中性子発生量や放射化量を適切に評価する必要がある。しかし、入射陽子のエネルギーが10-20MeV程度の低エネルギー領域に関しては、計算コード(理論計算モデル)も十分に検証されていない。 本研究では、18MeV陽子による加速器構造材等(ベリリウム、窒素、酸素、炭素、アルミニウム、銅、タンタル)の生成中性子のエネルギー及び0°から150°までの角度分布データの測定を行った。測定結果は、PHITS(核内カスケードモデル)の計算値やENDF/B-VIIと比較した。
  • 岩元洋介, 佐藤大樹, 萩原雅之, 岩瀬広, 八島浩, 中根佳弘, 中島宏, 坂本幸夫, 佐藤達彦, 民井淳, 畑中吉治, 中村尚司 日本原子力学会秋の大会予稿集(CD-ROM) 2008 (0) B02 -55 2008年08月21日 [査読無し][通常論文]
     
    数百MeV領域の粒子加速器の中性子遮蔽設計に用いられる放射線輸送計算コードの精度検証のために、中性子生成実験データが必要となる。しかしながら180度方向に関しては実験データが全くなく、コード及び物理モデルの検証が全く行われていない。そこで本研究では、大阪大学核物理研究センター・中性子TOF実験室のビーム・スウィンガー・マグネットを用いて、150MeV陽子入射による180度方向の中性子生成二重微分断面積測定を行い、コードの精度並びに蒸発モデルの検証を行う。今回は測定環境の整備を含む予備測定について発表を行う。
  • 松田規宏, 春日井好己, 松村宏, 八島浩, 岩瀬広, 木下哲一, 佐波俊哉, MOKHOV Nikolai, LEVELING Anthony, BOEHNLEIN David, KAMRAN Vaziri, 中島宏, 坂本幸夫, 平山英夫, 石橋健二, 大石晃嗣, 中村尚司, 仁井田浩二, 中尾徳晶, GARY Lautenschlager, WAYNE Schmitt 日本原子力学会秋の大会予稿集(CD-ROM) 2008 H52 2008年08月21日 [査読無し][通常論文]
  • 萩原雅之, 佐波俊哉, 岩元洋介, 荒川弘之, 執行信寛, 岩瀬広, MOKHOV Nikolai, LEVELING Anthony, BOEHNLEIN David, VAZIRI Kamran, 中島宏, 坂本幸夫, 中尾徳晶, 大石晃嗣 日本原子力学会秋の大会予稿集(CD-ROM) 2008 H50 2008年08月21日 [査読無し][通常論文]
  • 八島浩, 春日井好己, 松村宏, 松田規宏, 岩瀬広, 木下哲一, MOKHOV Nikolai, LEVELING Anthony, BOEHNLEIN David, KAMRAN Vaziri, 中島宏, 坂本幸夫, 平山英夫, 石橋健二, 大石晃嗣, 中村尚司, GARY Lautenschlager, WAYNE Schmitt 日本原子力学会秋の大会予稿集(CD-ROM) 2008 H51 2008年08月21日 [査読無し][通常論文]
  • 岩瀬広, 仁井田浩二, 波戸芳仁, 佐藤達彦, 羽倉洋行, 岩元洋介, 松田規宏, SIHVER Lembit, 坂本幸夫, 中島宏, 伴秀一, 平山英夫 日本原子力学会秋の大会予稿集(CD-ROM) 2008 H58 2008年08月21日 [査読無し][通常論文]
  • 佐波俊哉, 萩原雅之, 岩元洋介, 荒川弘之, 執行信寛, 岩瀬広, MOKHOV Nikolai, LEVELING Anthony, BOEHNLEIN David, VAZIRI Kamran, 中島宏, 坂本幸夫, 中尾徳晶, 大石晃嗣 日本原子力学会秋の大会予稿集(CD-ROM) 2008 H49 2008年08月21日 [査読無し][通常論文]
  • 木下哲一, 春日井好己, 八島浩, 岩瀬広, 松田規宏, 松村宏, 佐波俊哉, 岩元洋介, 萩原雅之, 執行信寛, 荒川弘之, 中島宏, 坂本幸夫, 大石晃嗣, 中尾徳晶, 豊田晃弘, 中村尚司, LEVELING Anthony, MOKHOV Nikolai, BOEHNLEIN David, VAZIRI Kamran, LAUTENSCHLAGER Gary, SCHMITT Wayne, CUPPS Vernon, KERSHISNIK Bess, BENISCH Steven 日本原子力学会秋の大会予稿集(CD-ROM) 2008 H54 2008年08月21日 [査読無し][通常論文]
  • 松村宏, 春日井好己, 八島浩, 岩瀬広, 松田規宏, 木下哲一, 佐波俊哉, 岩元洋介, 萩原雅之, 執行信寛, 荒川弘之, 中島宏, 坂本幸夫, 中尾徳晶, 豊田晃弘, 大石晃嗣, 中村尚司, LEVELING Anthony, BOEHNLEIN David, MOKHOV Nikolai, VAZIRI Kamran, LAUTENSCHLAGER Gary, SCHMITT Wayne 日本原子力学会秋の大会予稿集(CD-ROM) 2008 H53 2008年08月21日 [査読無し][通常論文]
  • 中島宏 日本原子力学会春の年会予稿集(CD-ROM) 2008 C22 2008年03月11日 [査読無し][通常論文]
  • 佐波俊哉, 萩原雅之, 大石卓司, 馬場護, 田中進, 中島宏 日本原子力学会春の年会要旨集 43rd (0) 211 -34 2005年03月11日 [査読無し][通常論文]
     
    中性子による二次フラグメント(Heより重たい二次粒子)の測定のためにBragg curve spectrometer(BCS)を開発している。BCSのアノードにセグメント構造を適用し良好な結果を得たので報告する。
  • Nakashima, H, Nakane., Y, Masukawa, F, Matsuda, N, Oguri, T, Nakano, N, Shibata, T, Suzuki, T, Miura, T, Numajiri, M, Nakao, N, Hirayama, H, Sasaki, S Radiat. Prot. Dosim. 115 564 -569 2005年 [査読無し][通常論文]
  • M Hagiwara, T Sanami, M Baba, T Oishi, N Hirabayashi, M Takada, H Nakashima, S Tanaka International Conference on Nuclear Data for Science and Technology, Pts 1 and 2 769 1031 -1034 2005年 [査読無し][通常論文]
     
    Measurement of differential fragment production cross sections for proton- and neutron-induced reactions is described. The double-differential fragment production cross-section for 70-MeV protons and the yields for 75 MeV neutrons were obtained with a specially designed Bragg curve spectrometer (BCS). An experiment is also described for proton-induced reactions employing the E-TOF method to obtain complementary and more detailed information than neutron-induced reactions.
  • 佐波俊哉, 萩原雅之, 細川幹弘, 平林直哉, 馬場護, 田中進, 中島宏 日本原子力学会秋の大会予稿集 2002 80 2002年08月05日 [査読無し][通常論文]
  • H. Nakashima, et al., Research Activities on Neutronics under ASTE Collaboration as AGS/BNL
    J. Nucl. Sci. Technol. ((suppl.2)) 1155 2002年 [査読無し][通常論文]
  • H. Nakashima, et al., Current Status of the AGS Spallation Target Experiment, to be published as Proc. of OECD/NEA Workshop on Shielding Aspects on Accelerator, and Irradiation Facilities.
    SLAC (Apr. 2002) 10 -12 2002年 [査読無し][通常論文]
  • H. Nakashima, et al., Research Activities on Neutronics under ASTE Collaboration as AGS/BNL
    J. Nucl. Sci. Technol. ((suppl.2)) 1155 2002年 [査読無し][通常論文]
  • H. Nakashima, et al., Current Status of the AGS Spallation Target Experiment, to be published as Proc. of OECD/NEA Workshop on Shielding Aspects on Accelerator, and Irradiation Facilities.
    SLAC (Apr. 2002) 10 -12 2002年 [査読無し][通常論文]
  • Masahide Harada, Yukinobu Watanabe, Yasuhiro Tanaka, Yasuaki Matsuoka, Kazuo Shin, Shin Ichiro Meigo, Hiroshi Nakashima, Hiroshi Takada, Toshinobu Sasa, Osamu Iwamoto, Tokio Fukahori, Satoshi Chiba, Susumu Tanaka Journal of Nuclear Science and Technology 39 393 -396 2002年01月01日 [査読無し][通常論文]
     
    Double-differential cross sections (DDXs) have been measured for light-charged particle production in proton- induced reactions on l2C, 27Al, 58Ni, 90Zr, 197Au, and 209Bi at incident energies of 42 and 68 MeV. The measured DDXs for 12C, 27 Al, and 58 Ni are compared with the LA150 evaluation. Good overall agreement is found except for the (p, xd) reaction. The dependence of total yields of secondary charged-particles on target mass number is investigated. © 2014 Atomic Energy Society of Japan. All Rights Reserved.
  • M. Baba, M. Ibaraki, T. Miura, T. Aoki, Y. Hirasawa, H. Nakashima, S. Meigo, Su Tanaka Journal of Nuclear Science and Technology 39 198 -203 2002年01月01日 [査読無し][通常論文]
     
    Experiments on the 1) neutron elastic scattering for 55, 65 and 75 MeV neutrons, and 2) prompt fission neutron spectrum for MeV neutrons are described. The neutron elastic scattering cross sections have been measured for C, Si, Fe, Zr, and Pb at the 7Li(p, n) quasi-monoenergetic neutron source facility at TIARA, JAERI using the TOF method. Data were obtained at twenty-five laboratory angles between 2.6° and 53° that could clarify the angular distributions and angle-integrated values. Fission spectrum data were obtained for 233U, 238U and 232Th at 0.6, 1.9 and 4.1 MeV. The data at 1.9 and 4.1 MeV were given in absolute scale by taking the 238U data as the standard to clarify the problem of data files. © 2014 Atomic Energy Society of Japan. All Rights Reserved.
  • Masanobu Ibaraki, Mamoru Baba, Takako Miura, Takao Aqki, Tsutomu Hiroishi, Hiroshi Nakashima, Shin Ichiro Meigo, Susumu Tanaka Journal of Nuclear Science and Technology 39 405 -408 2002年01月01日 [査読無し][通常論文]
     
    Neutron non-elastic cross sections were measured for carbon, silicon, iron, zirconium and lead in 40-80 MeV region using the transmission method with a “close-geometry” using the 7Li(p, n) quasi-monoenergetic neutron source at TIARA of JAERI. The results were favorably compared with other experimental data and the libraries. © 2002 Atomic Energy Society of Japan.
  • N Nariyama, S Tanaka, Y Nakane, H Nakashima, H Hirayama, S Ban, Y Namito, K Hyodo, T Takeda MEDICAL PHYSICS 28 (1) 16 -21 2001年01月 [査読無し][通常論文]
     
    Coronary cineangiography using synchrotron radiation is anticipated, owing to the high intensity and availability of monoenergy. To investigate allowable dose levels in clinical application, absorbed dose distribution in a tissue substitute phantom for a conventional x-ray machine was measured with thermoluminescent dosimeters at the University of Tsukuba under the practical conditions used for digital angiography. The dose rate at a 0.5-cm depth was 0.145 Gy/s, and the dose per frame was 0.725 mGy for the irradiation period of 5 ms per frame. For synchrotron radiation, the dose distribution measurement was made at a 5-GeV AR (Accumulation Ring) of the High Energy Accelerator Research Organization, in which a polymethylmethacrylate (PMMA) phantom was irradiated with the strongest beam available at the facility, which was 33.32 keV, 5.2x6.2cm(2) beam. Using this beam, a I-mm-diameter coronary artery has been visualized at 1% iodine concentration at the AR. Nonhomogeneous strength distribution in the beam was observed in the vertical direction. The maximum dose rate was 0.556 Gy/s, and it attenuated to 1/3000 at a 30-cm depth in the beam center. At the deep positions, the doses were influenced by the high harmonics, which was confirmed with an EGS4 Monte Carlo calculation. Outside the beam, beam contamination on both sides of the main beam affected the doses. For comparison to the x-ray machine, the measured dose was analytically converted to that needed for a 5.2x16cm(2) beam that is used for clinical application. The dose rate at 0.5-cm depth was found to be 0.215 Gy/s, which is 1.48 times larger than that for x-rays. Moreover, the attenuation rate in the phantom was significantly greater than that of the x-ray machine, because of the difference of the energy spectra between the x-rays and synchrotron radiation used. (C) 2001 American Association of Physicists in Medicine.
  • Experimental method for neutron elastic scattering cross-section measurement in 40-90 MeV region at TIARA
    M Ibaraki, M Baba, T Miura, Y Hirasawa, Y Nauchi, H Nakashima, SI Meigo, O Iwamoto, S Tanaka NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 446 (3) 536 -544 2000年05月 [査読無し][通常論文]
     
    An experimental setup and data correction method were established for the measurements of elastic scattering cross-sections for neutrons of tens of MeV at TIARA facility of JAERI. Data can be obtained for 25 laboratory angles between 2.6 degrees and 53.0 degrees by utilizing a Li-7(p,n) quasi-monoenergetic neutron source and a time-of-flight method (TOF). Data correction for the effects of inelastic neutrons and a finite sample size is done using the LA 150 data. Typical results of neutron elastic scattering are presented as well as the experimental and data correction methods. (C) 2000 Elsevier Science B.V. All rights reserved.
  • Experimental method for neutron elastic scattering cross-section measurement in 40-90 MeV region at TIARA
    M Ibaraki, M Baba, T Miura, Y Hirasawa, Y Nauchi, H Nakashima, SI Meigo, O Iwamoto, S Tanaka NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 446 (3) 536 -544 2000年05月 [査読無し][通常論文]
     
    An experimental setup and data correction method were established for the measurements of elastic scattering cross-sections for neutrons of tens of MeV at TIARA facility of JAERI. Data can be obtained for 25 laboratory angles between 2.6 degrees and 53.0 degrees by utilizing a Li-7(p,n) quasi-monoenergetic neutron source and a time-of-flight method (TOF). Data correction for the effects of inelastic neutrons and a finite sample size is done using the LA 150 data. Typical results of neutron elastic scattering are presented as well as the experimental and data correction methods. (C) 2000 Elsevier Science B.V. All rights reserved.
  • C. Konno, F. Maekawa, M. Wada, H. Nakashima and K. Kosaka, Analyses of Iron and Concrete Shielding Experiments for 43 and 68 Mev P-7Li Neutrons with La150
    J. Nucl. Sci. Technol ((Supp1.)) 187 -191 2000年 [査読無し][通常論文]
  • H. Nakashima, T. Masumura, Su. Tanaka, Y. Sakamoto, H. Takada, Sh, Tanaka, Y. Nakane, S. Meigo, T. Nakamura, T. Korisawa, H. Hirayama, N. Nakao, Y. Uwamino, M. Imamura and K. Shin, Analyses of Neutron and Gamma Ray Measurements in a Target Room of Seve・・・
    J. Nucl. Sci. Technol ((Supp1.)) 192 -196 2000年 [査読無し][通常論文]
     
    H. Nakashima, T. Masumura, Su. Tanaka, Y. Sakamoto, H. Takada, Sh, Tanaka, Y. Nakane, S. Meigo, T. Nakamura, T. Korisawa, H. Hirayama, N. Nakao, Y. Uwamino, M. Imamura and K. Shin, Analyses of Neutron and Gamma Ray Measurements in a Target Room of Several Tens Mev Proton Facility
  • H. Nakashima, T. Masamuta, Su. Tanaka, Y. Sakamoto, Su, Tanaka, Y. Sakamoto. Sh. Tanaka, Y. Nakane, S. Meigo, T. Nakamura, T. Kurosawa, H. Hirayama, N. Nakao, Y. Uwamino. M. Imamura and K. Shin, Experimental Analyses on Radiation Streaming through a La・・・
    J. Nucl. Sci. Technol ((Supp1.)) 197 -201 2000年 [査読無し][通常論文]
     
    H. Nakashima, T. Masamuta, Su. Tanaka, Y. Sakamoto, Su, Tanaka, Y. Sakamoto. Sh. Tanaka, Y. Nakane, S. Meigo, T. Nakamura, T. Kurosawa, H. Hirayama, N. Nakao, Y. Uwamino. M. Imamura and K. Shin, Experimental Analyses on Radiation Streaming through a Labyrinth in a Proton Accelerator Pacility of Several Tens Mev
  • T. Tsukiyama, R. Tayama, H. Handa, K. Hayashi, K. Yamada, T. Abe, N. Kurosawa, N, Sasamoto, H. Nakashima and Y. Sakamoto. Shine-Ⅲ: Simple Code for Skyshine Dose Calculation up to 3 GeV Neutrons
    J. Nucl. Sci. Technol ((supp1.)) 640 -644 2000年 [査読無し][通常論文]
  • M. Ibaraki, M. Baba, T. Miura, Y. Nauchi, Y. Hirasawa, N. Nakashima, S. Meigo, O. Iwamoto, and Su. Tanaka, Measurment of Elastic Scattering Cross Sections for Carbon, Silicon, Iron, Zirconium and Lead for 75 Mev Neutrons
    J. Nucl. Sci. Technol ((Supp1.)) 683 -686 2000年 [査読無し][通常論文]
  • M. Harada, Y. Watanabe, A. Yamamoto, Y. Tanaka, S. Weili, K. Shin, S. Meigo, O. Iwamoto, H. Nakashima, H. Takada, S. Chiba, T. Fukahori, T. Sasa and Su. Tanaka, Measurements of Double Differential Cross Sections of Secondary Charged-Particles Produced ・・・
    J. Nucl. Sci. Technol. ((supp1)) 687 -691 2000年 [査読無し][通常論文]
     
    M. Harada, Y. Watanabe, A. Yamamoto, Y. Tanaka, S. Weili, K. Shin, S. Meigo, O. Iwamoto, H. Nakashima, H. Takada, S. Chiba, T. Fukahori, T. Sasa and Su. Tanaka, Measurements of Double Differential Cross Sections of Secondary Charged-Particles Produced by Proton-Induced Recations at Several Tens of MeV.
  • S.Meigo, F. Maekawa, H. Nakashima and T. Ito, Development of Current Mode Time-of-flight Technique for Measurement of Thermal Neutron Spectrum.
    J. Nucl.Sci. Technol. ((supp1)) 789 -793 2000年 [査読無し][通常論文]
  • H. Nakashima, N. Sasamoto, Y. Sakamoto, J. Kusani, K. Hasegawa, H. handa, K. Hayashi, K. Yamada and T. Abe, Estimation of activity and dose distributions around a proton linac induced by beam spill
    J. Nucl. Sci. Technol. ((Supp1.)) 870 -874 2000年 [査読無し][通常論文]
  • M. Baba, T. Sanami, Y. Naushi, Y. Hirasawa, Y. Hirasawa, H. Nakashima, S. Meigo and Su. Tanaka, Measurement of Differential Neutron-Induced Charged-Particle Emission Cross Sections for 5-75 MeV Neutrons
    Proc. 10-th Int. Conf on Reactor Dosimetry 2000年 [査読無し][通常論文]
  • H. Nakano, R. Tayama, T. Tsukiyama, H. Handa, K. Hayashi, K. Shin, H. Hirayama, H. Nakashima, F. Masukawa, N. Sasamoto, L. Yamada and T. Abe, Development of DUCT-Ⅲ Code for Duct Streaming Calculation up to 3 GeV
    Proc. on Shielding Aspects of Accelerators, Targets and Irradiation Facilities (SATIF-5), Paris, France (July) 17 -21 2000年 [査読無し][通常論文]
  • H. Handa, H. Nakashima, Y. Sakamoto, N. Sasamoto, R. Tayama, K. Hayashi, T. Abe, and K. Yamada, Deep Penetration Calsulations of Neutrons up to 1.5 Gev
    Proc. on Shielding Aspects of Accelerators, Targets and Irradiation Facilities (SATIF-5), Paris, France (July) 17 -21 2000年 [査読無し][通常論文]
  • S. Meigo, H. Takada, H. Nakashima, et al ., Measurement of Spectrum for Thermal Neutrons Produced from H2 Moderator coupled with Mercury Target
    Proc. on ICANS-XV, November, 2000, Tsukuba Japan (941) 2000年 [査読無し][通常論文]
  • Y. Kasugai, H. Takada, H. Nakashima, et al., Measurement of induced radioactivity in a Spallation neutron field of a mercury target for GeV-proton bombardment
    ibid (995) 2000年 [査読無し][通常論文]
  • F. Maekawa, H. Takada, Y. Kasugai. H. Nakashima, et al., Analysis of the AGS Experiment on a Mercury Target with a Moderator and a Lead Reflector Bombarded by GeV Energy Protons
    ibid (983) 2000年 [査読無し][通常論文]
  • C. Konno, F. Maekawa, M. Wada, H. Nakashima and K. Kosaka, Analyses of Iron and Concrete Shielding Experiments for 43 and 68 Mev P-7Li Neutrons with La150
    J. Nucl. Sci. Technol ((Supp1.)) 187 -191 2000年 [査読無し][通常論文]
  • H. Nakashima, T. Masumura, Su. Tanaka, Y. Sakamoto, H. Takada, Sh, Tanaka, Y. Nakane, S. Meigo, T. Nakamura, T. Korisawa, H. Hirayama, N. Nakao, Y. Uwamino, M. Imamura and K. Shin, Analyses of Neutron and Gamma Ray Measurements in a Target Room of Seve・・・
    J. Nucl. Sci. Technol ((Supp1.)) 192 -196 2000年 [査読無し][通常論文]
     
    H. Nakashima, T. Masumura, Su. Tanaka, Y. Sakamoto, H. Takada, Sh, Tanaka, Y. Nakane, S. Meigo, T. Nakamura, T. Korisawa, H. Hirayama, N. Nakao, Y. Uwamino, M. Imamura and K. Shin, Analyses of Neutron and Gamma Ray Measurements in a Target Room of Several Tens Mev Proton Facility
  • . Nakashima, T. Masamuta, Su. Tanaka, Y. Sakamoto, Su, Tanaka, Y. Sakamoto. Sh. Tanaka, Y. Nakane, S. Meigo, T. Nakamura, T. Kurosawa, H. Hirayama, N. Nakao, Y. Uwamino. M. Imamura and K. Shin, Experimental Analyses on Radiation Streaming through a Lab・・・
    J. Nucl. Sci. Technol ((Supp1.)) 197 -201 2000年 [査読無し][通常論文]
     
    . Nakashima, T. Masamuta, Su. Tanaka, Y. Sakamoto, Su, Tanaka, Y. Sakamoto. Sh. Tanaka, Y. Nakane, S. Meigo, T. Nakamura, T. Kurosawa, H. Hirayama, N. Nakao, Y. Uwamino. M. Imamura and K. Shin, Experimental Analyses on Radiation Streaming through a Labyrinth in a Proton Accelerator Pacility of Several Tens Mev
  • T. Tsukiyama, R. Tayama, H. Handa, K. Hayashi, K. Yamada, T. Abe, N. Kurosawa, N, Sasamoto, H. Nakashima and Y. Sakamoto. Shine-Ⅲ: Simple Code for Skyshine Dose Calculation up to 3 GeV Neutrons
    J. Nucl. Sci. Technol ((supp1.)) 640 -644 2000年 [査読無し][通常論文]
  • M. Ibaraki, M. Baba, T. Miura, Y. Nauchi, Y. Hirasawa, N. Nakashima, S. Meigo, O. Iwamoto, and Su. Tanaka, Measurment of Elastic Scattering Cross Sections for Carbon, Silicon, Iron, Zirconium and Lead for 75 Mev Neutrons
    J. Nucl. Sci. Technol ((Supp1.)) 683 -686 2000年 [査読無し][通常論文]
  • M. Harada, Y. Watanabe, A. Yamamoto, Y. Tanaka, S. Weili, K. Shin, S. Meigo, O. Iwamoto, H. Nakashima, H. Takada, S. Chiba, T. Fukahori, T. Sasa and Su. Tanaka, Measurements of Double Differential Cross Sections of Secondary Charged-Particles Produced ・・・
    J. Nucl. Sci. Technol. ((supp1)) 687 -691 2000年 [査読無し][通常論文]
     
    M. Harada, Y. Watanabe, A. Yamamoto, Y. Tanaka, S. Weili, K. Shin, S. Meigo, O. Iwamoto, H. Nakashima, H. Takada, S. Chiba, T. Fukahori, T. Sasa and Su. Tanaka, Measurements of Double Differential Cross Sections of Secondary Charged-Particles Produced by Proton-Induced Recations at Several Tens of MeV.
  • S.Meigo, F. Maekawa, H. Nakashima and T. Ito, Development of Current Mode Time-of-flight Technique for Measurement of Thermal Neutron Spectrum.
    J. Nucl.Sci. Technol. ((supp1)) 789 -793 2000年 [査読無し][通常論文]
  • H. Nakashima, N. Sasamoto, Y. Sakamoto, J. Kusani, K. Hasegawa, H. handa, K. Hayashi, K. Yamada and T. Abe, Estimation of activity and dose distributions around a proton linac induced by beam spill
    J. Nucl. Sci. Technol. ((Supp1.)) 870 -874 2000年 [査読無し][通常論文]
  • M. Baba, T. Sanami, Y. Naushi, Y. Hirasawa, Y. Hirasawa, H. Nakashima, S. Meigo and Su. Tanaka, Measurement of Differential Neutron-Induced Charged-Particle Emission Cross Sections for 5-75 MeV Neutrons
    Proc. 10-th Int. Conf on Reactor Dosimetry 2000年 [査読無し][通常論文]
  • H. Nakano, R. Tayama, T. Tsukiyama, H. Handa, K. Hayashi, K. Shin, H. Hirayama, H. Nakashima, F. Masukawa, N. Sasamoto, L. Yamada and T. Abe, Development of DUCT-Ⅲ Code for Duct Streaming Calculation up to 3 GeV
    Proc. on Shielding Aspects of Accelerators, Targets and Irradiation Facilities (SATIF-5), Paris, France (July) 17 -21 2000年 [査読無し][通常論文]
  • H. Handa, H. Nakashima, Y. Sakamoto, N. Sasamoto, R. Tayama, K. Hayashi, T. Abe, and K. Yamada, Deep Penetration Calsulations of Neutrons up to 1.5 Gev
    Proc. on Shielding Aspects of Accelerators, Targets and Irradiation Facilities (SATIF-5), Paris, France (July) 17 -21 2000年 [査読無し][通常論文]
  • S. Meigo, H. Takada, H. Nakashima, et al ., Measurement of Spectrum for Thermal Neutrons Produced from H2 Moderator coupled with Mercury Target
    Proc. on ICANS-XV, November, 2000, Tsukuba Japan (941) 2000年 [査読無し][通常論文]
  • Y. Kasugai, H. Takada, H. Nakashima, et al., Measurement of induced radioactivity in a Spallation neutron field of a mercury target for GeV-proton bombardment
    J. Nucl. Sci. Technol. (995) 2000年 [査読無し][通常論文]
  • F. Maekawa, H. Takada, Y. Kasugai. H. Nakashima, et al., Analysis of the AGS Experiment on a Mercury Target with a Moderator and a Lead Reflector Bombarded by GeV Energy Protons
    J. Nucl. Sci. Technol. (983) 2000年 [査読無し][通常論文]
  • Hiroshi Nakashima, Tomomi Masumura, Susumu Tanaka, Yukio Sakamoto, Hiroshi Takada, Shun Ichi Tanaka, Yoshihiro Nakane, Shinichirou Meigo, Takashi Nakamura, Tadahiro Kurosawa, Hideo Hirayama, Noriaki Nakao, Yoshitomo Uwamino, Mineo Imamura, Kazuo Shin Journal of Nuclear Science and Technology 37 197 -201 2000年01月01日 [査読無し][通常論文]
     
    In order to estimate the accuracy of calculation methods such as empirical formulas and Monte Carlo codes for neutron and gamma ray fluxes through a labyrinth connected with a room having a Cu target irradiated by 68-MeV-proton, experimental analyses are carried out. As results of the analyses, the followings are obtained. (l)The MCNP calculation is applicable to estimation of neutron and gamma ray dose equivalent rates in the labyrinth, although cross sections in the process of neutron thermalization and gamma ray production cross section should be modified for more precise estimation. (2)The empirical formulas are useful for estimation of neutron dose equivalent rate. However, an additional safety factor of 2 should be required to apply to the estimation of total dose equivalent rates, because the contribution of gamma ray dose equivalent rate increases with the distance in the labyrinth and becomes comparable to that of neutron dose equivalent rate at the distance longer than 20 m. © 2014 Atomic Energy Society of Japan. All rights reserved.
  • Hiroshi Nakashima, Tomomi Masumura, Susumu Tanaka, Yukio Sakamoto, Hiroshi Takada, Shun Ichi Tanaka, Yoshihiro Nakane, Shinichirou Meigo, Takashi Nakamura, Tadahiro Kurosawa, Hideo Hirayama, Noriaki Nakao, Yoshitomo Uwamino, Mineo Imamura, Kazuo Shin Journal of Nuclear Science and Technology 37 192 -196 2000年01月01日 [査読無し][通常論文]
     
    In order to estimate the accuracy of calculation methods such as an empirical formula and Monte Carlo codes for neutron and gamma ray flux in a room with a Cu target irradiated by 68-MeV-proton, experimental analyses are carried out. The analyses reveals that (1) the NMTC/JAERI code is applicable to source neutron calculation, (2) the Patterson’s equation with Ishikawa’s parameter is useful and estimates thermal neutron flux conservatively and (3) the MCNP calculation underestimates the fast neutron scattered back from the wall of the room, consequently the secondary gamma ray from the wall. © 2014 Atomic Energy Society of Japan. All rights reserved.
  • Masahide Harada, Yukinobu Watanabe, Akihisa Yamamoto, Yasuhiro Tanaka, Sun Weili, Kazuo Shin, Shin Ichiro Meigo, Osamu Iwamoto, Hiroshi Nakashima, Hiroshi Takada, Satoshi Chiba, Tokio Fukahori, Toshinobu Sasa, Susumu Tanaka Journal of Nuclear Science and Technology 37 687 -691 2000年01月01日 [査読無し][通常論文]
     
    Double differential cross sections (DDXs) were measured for production of light-charged particles in proton-induced reactions on 12C and 27A1 at two incident energies of 42 and 68 MeV. The measured DDXs were in generally good agreement with LA150 evaluation, except for (p, xd) reactions. The experimental angular distributions of proton elastic and inelastic scattering from 12C showed fairly good agreement with a coupled-channels calculation based on the soft-rotator model. © 2014 Atomic Energy Society of Japan. All rights reserved.
  • Y Nauchi, M Baba, T Sanami, M Ibaraki, T Iwasaki, N Hirakawa, S Tanaka, S Meigo, H Nakashima, H Takada, T Nakamura, Y Watanabe J. Nucl. Sci. Technol 36 (2) 143 -151 1999年02月 [査読無し][通常論文]
     
    Y. Nauchi M. Baba, T. Sanami, M. Ibaraki, T. Iwasaki, N. Hirakawa, Su. Tanaka, S. Meigo, H. Nakashima, H. Takada, T. Nakamura and Y. Watanabe, Measurement of (n, xp), (n, xd) Double Differential Cross Sections of Carbon and Aluminum for 65 and 75 MeV Neutrons
  • Y Nauchi, M Baba, T Sanami, M Ibaraki, T Iwasaki, N Hirakawa, S Tanaka, S Meigo, H Nakashima, H Takada, T Nakamura, Y Watanabe JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY 36 (2) 143 -151 1999年02月 [査読無し][通常論文]
     
    Double differential (n, xp), (n, xd) cross sections of carbon and aluminum were measured for 65 and 75 MeV neutrons at angles between 12 degrees and 70 degrees using Delta E-E telescopes at a Li-7(p, n) neutron source facility at TIARA. The data at 12 degrees were obtained by employing an annular geometry. The telescopes consisting of SSD and NaI(Tl) scintillator, experimental methods and the data reduction procedures are presented as well as the results. The carbon data are compared favorably with existing experimental data. The (n, xp) spectra of both carbon and aluminum agreed fairly well with theoretical calculations based on the intra-nuclear cascade model and the multi-step Hauser-Feshbach model including preequilibrium effects, but the (n, xd) spectra differ significantly from those calculations.
  • Nucl. Instrum. Methods (A428) 454 -465 1999年 [査読無し][通常論文]
     
    M. Baba, Y. Nauchi, T. Iwasaki, T. Kiyosumi, M. Yoshioka, S. Matsuyama, N. Hirakawa, T. Nakamura, Su, Tanaka, S. Meigo, H. Nakashima, Sh. Tanaka and N. Nakao, Characterization of A 40-90 Mev 7Li (p,n) neutron source at TIARA using a proton recoil telescope and a Tof method
  • Nucl. Instrum. Methods (A428) 454 -465 1999年 [査読無し][通常論文]
     
    M. Baba, Y. Nauchi, T. Iwasaki, T. Kiyosumi, M. Yoshioka, S. Matsuyama, N. Hirakawa, T. Nakamura, Su, Tanaka, S. Meigo, H. Nakashima, Sh. Tanaka and N. Nakao, Characterization of A 40-90 Mev 7Li (p,n) neutron source at TIARA using a proton recoil telescope and a Tof method
  • T Iwasaki, Y Sakuya, N Hirakawa, H Nakashima, Y Sakamoto, H Takada, S Tanaka JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY 35 (3) 169 -177 1998年03月 [査読無し][通常論文]
     
    Fission rates of Np-237 and U-238 in polyethylene (CH2) system were measured with a 65 MeV quasi monoenergetic neutron source. Relative fission rate distributions dependent on polyethylene thickness up to about 70 cm were obtained for both nuclides with the experimental error within 7%. The present experiment was analyzed by the NMTC/JAERI code that has been employed for designing accelerator-driven transmutation systems. The fission rates of both Np-237 and U-238 calculated by the NMTC/JAERI did not agree with the experimental ones. The C/E values for both were about 2.0 at 71.8 cm of polyethylene thickness when both experimental and calculated values were normalized to 1.0 at 0.0 cm of polyethylene thickness. A sensitivity analysis of the NMTC/JAERI was performed by changing cross sections and angular distributions of hydrogen and carbon and by employing three options of the intra-nuclear cascade/evaporation calculation of the NMTC/JAERI. The disagreement of the NMTC/JAERI calculation with the experimental values was partially improved by increasing the nonelastic-scattering cross section of carbon and by broadening the elastic-scattering angular distribution of carbon.
  • T Iwasaki, Y Sakuya, N Hirakawa, H Nakashima, Y Sakamoto, H Takada, S Tanaka JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY 35 (3) 169 -177 1998年03月 [査読無し][通常論文]
     
    Fission rates of Np-237 and U-238 in polyethylene (CH2) system were measured with a 65 MeV quasi monoenergetic neutron source. Relative fission rate distributions dependent on polyethylene thickness up to about 70 cm were obtained for both nuclides with the experimental error within 7%. The present experiment was analyzed by the NMTC/JAERI code that has been employed for designing accelerator-driven transmutation systems. The fission rates of both Np-237 and U-238 calculated by the NMTC/JAERI did not agree with the experimental ones. The C/E values for both were about 2.0 at 71.8 cm of polyethylene thickness when both experimental and calculated values were normalized to 1.0 at 0.0 cm of polyethylene thickness. A sensitivity analysis of the NMTC/JAERI was performed by changing cross sections and angular distributions of hydrogen and carbon and by employing three options of the intra-nuclear cascade/evaporation calculation of the NMTC/JAERI. The disagreement of the NMTC/JAERI calculation with the experimental values was partially improved by increasing the nonelastic-scattering cross section of carbon and by broadening the elastic-scattering angular distribution of carbon.
  • K. Shin, S. Ono, S. Meigo, H. Takada, T. Sada and H. Nakashima, Thick Target Neutron and Gamma-ray Yields of c, Fe and Zr for 220-MeV C and 460-MeV Ar Ion
    Proc. 1998 ANS Radiat. Protec. & Shielding Topical Conference Nashville Vol.Ⅰ 207 -214 1998年 [査読無し][通常論文]
  • H. Nakashima, H. Takada, S. Meigo, Y. Kasugai, Y. Oyama and N. Watanabe, Measurement of Incident Proton Beam Characteristics for AGS Spallation Target Experiment
    Proc. on the 14th Meeting of the International Collaboration on Advanced Neutron Sources(ICANS-ⅩⅣ) 457 -467 1998年 [査読無し][通常論文]
  • H. Takada, Y. Kasugai, H. Nakashima, Y. Ikeda, Y. Oyama, N. Watanabe, M.Arai and Y. Kiyunagi, Measurement of Reaction Rate Distributions on a Mercury Target Bombarded with High Energy Protons
    Proc. on the 14th Meeting of the International Collaboratioin on Advanced Neutron Sources(ICANS-ⅩⅣ) 468 -486 1998年 [査読無し][通常論文]
  • K. Shin, S. Ono, S. Meigo, H. Takada, T. Sada and H. Nakashima, Thick Target Neutron and Gamma-ray Yields of c, Fe and Zr for 220-MeV C and 460-MeV Ar Ion
    Proc. 1998 ANS Radiat. Protec. & Shielding Topical Conference Nashville Vol.Ⅰ 207 -214 1998年 [査読無し][通常論文]
  • H. Nakashima, H. Takada, S. Meigo, Y. Kasugai, Y. Oyama and N. Watanabe, Measurement of Incident Proton Beam Characteristics for AGS Spallation Target Experiment
    Proc. on the 14th Meeting of the International Collaboration on Advanced Neutron Sources(ICANS-ⅩⅣ) 457 -467 1998年 [査読無し][通常論文]
  • H. Takada, Y. Kasugai, H. Nakashima, Y. Ikeda, Y. Oyama, N. Watanabe, M.Arai and Y. Kiyunagi, Measurement of Reaction Rate Distributions on a Mercury Target Bombarded with High Energy Protons
    Proc. on the 14th Meeting of the International Collaboratioin on Advanced Neutron Sources(ICANS-ⅩⅣ) 468 -486 1998年 [査読無し][通常論文]
  • Y Nakane, H Nakashima, Y Sakamoto RADIATION MEASUREMENTS 27 (3) 445 -452 1997年06月 [査読無し][通常論文]
     
    A code system SSNRES using the Monte Carlo method has been developed for calculating the energy response of a solid state nuclear track detector (SSNTD) which has a polyethylene radiator to neutrons in the energy range from 100 keV to 20 MeV. To evaluate the accuracy of the code system, energy response of an SSNTD was measured for mono-energetic neutrons of 250 keV, 1 MeV, 5 MeV and 15 MeV, and for Cf-252 fission neutrons. Calculated responses were in good agreement with the experimental ones. Calculated results show that the contribution of recoil-proton was dominant in the detector response at the neutron energy below 10 MeV, while that of charged particles produced by the neutron interactions with carbon and oxygen was dominant at 20 MeV. (C) 1997 Elsevier Science Ltd.
  • Y Nakane, H Nakashima, Y Sakamoto RADIATION MEASUREMENTS 27 (3) 445 -452 1997年06月 [査読無し][通常論文]
     
    A code system SSNRES using the Monte Carlo method has been developed for calculating the energy response of a solid state nuclear track detector (SSNTD) which has a polyethylene radiator to neutrons in the energy range from 100 keV to 20 MeV. To evaluate the accuracy of the code system, energy response of an SSNTD was measured for mono-energetic neutrons of 250 keV, 1 MeV, 5 MeV and 15 MeV, and for Cf-252 fission neutrons. Calculated responses were in good agreement with the experimental ones. Calculated results show that the contribution of recoil-proton was dominant in the detector response at the neutron energy below 10 MeV, while that of charged particles produced by the neutron interactions with carbon and oxygen was dominant at 20 MeV. (C) 1997 Elsevier Science Ltd.
  • N Nakao, M Nakao, H Nakashima, S Tanaka, Y Sakamoto, Y Nakane, S Tanaka, T Nakamura JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY 34 (4) 348 -359 1997年04月 [査読無し][通常論文]
     
    Measurements of neutron energy spectra behind 30.5-, 61.0-, 122.0-, 183.0-cm-thick polyethylene shields bombarded by 40- and 65-MeV quasi-monoenergetic neutrons are performed at the 90-MeV AVF cyclotron of the TIARA (Takasaki Ion Accelerator for Advanced Radiation Application) at JAERI (Japan Atomic Energy Research Institute). Source neutrons are produced at 3.6- and 5.2-mm-thick Li-7 targets bombarded by 43- and 68-MeV protons, respectively. A BC501A organic liquid scintillator and multi-moderator spectrometer with a He-3 counter (Bonner ball) are used for spectrometry of transmitted neutrons and their energy spectra are obtained with the unfolding technique. The energy spectra from a few MeV up to a peak energy are obtained by the BC501A scintillator measurement and those below a few MeV down to thermal energy are obtained by the Bonner ball measurement. The measurements are performed on the neutron beam axis and at off-center positions, and attenuation profiles of neutron fluxes along the beam axis are obtained. The MORSE Monte Carlo calculations are performed with the DLC119/HILO86 multi-group cross section library for comparison with the measured data. The calculation generally gives a little overestimated fluxes, and a few % longer attenuation lengths of peak flux and dose equivalent.
  • N Nakao, M Nakao, H Nakashima, S Tanaka, Y Sakamoto, Y Nakane, S Tanaka, T Nakamura JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY 34 (4) 348 -359 1997年04月 [査読無し][通常論文]
     
    Measurements of neutron energy spectra behind 30.5-, 61.0-, 122.0-, 183.0-cm-thick polyethylene shields bombarded by 40- and 65-MeV quasi-monoenergetic neutrons are performed at the 90-MeV AVF cyclotron of the TIARA (Takasaki Ion Accelerator for Advanced Radiation Application) at JAERI (Japan Atomic Energy Research Institute). Source neutrons are produced at 3.6- and 5.2-mm-thick Li-7 targets bombarded by 43- and 68-MeV protons, respectively. A BC501A organic liquid scintillator and multi-moderator spectrometer with a He-3 counter (Bonner ball) are used for spectrometry of transmitted neutrons and their energy spectra are obtained with the unfolding technique. The energy spectra from a few MeV up to a peak energy are obtained by the BC501A scintillator measurement and those below a few MeV down to thermal energy are obtained by the Bonner ball measurement. The measurements are performed on the neutron beam axis and at off-center positions, and attenuation profiles of neutron fluxes along the beam axis are obtained. The MORSE Monte Carlo calculations are performed with the DLC119/HILO86 multi-group cross section library for comparison with the measured data. The calculation generally gives a little overestimated fluxes, and a few % longer attenuation lengths of peak flux and dose equivalent.
  • Point isotropic build-up factors of medium energy neutrons for concrete, iron and a double layer of iron followed by concrete
    K Shin, H Kotegawa, Y Sakamoto, Y Nakane, H Nakashima, S Tanaka, Y Uwamino, S Ban, H Hirayama, S Tanaka RADIATION PROTECTION DOSIMETRY 71 (4) 269 -278 1997年 [査読無し][通常論文]
     
    The neutron build-up factor is newly defined for describing the dose equivalent profiles of medium energy neutrons (E-n less than or equal to 400 MeV) in shields of concrete, iron and a double-layered shield of iron + concrete. The definition of the build-up factor is made in a straightforward way which is analogous to that of gamma rays. The obtained neutron build-up factors are parameterised by empirical expressions. Systematics of the parameters in the expressions and removal cross sections which are used instead of the linear attenuation coefficients in gamma ray cases, are examined regarding the neutron energy.
  • Y Nakane, H Nakashima, Y Sakamoto, S Tanaka RADIATION MEASUREMENTS 28 (1-6) 479 -482 1997年 [査読無し][通常論文]
     
    Reaction rate distributions in a plastic phantom were measured with solid state nuclear track detectors and a fission counter for 40- and 65-MeV quasi-monoenergetic neutrons generated by the Li-7(p,n) reactions with 43- and 68-MeV protons at AVF cyclotron of Japan Atomic Energy Research Institute. Measured distributions were compared with calculated ones.
  • K. Shin, S. Ono, K. Ishibashi, S. Meigo, H. Takada, N. Sasa, H. Nakashima, Sh. Tanaka, N. Nako, T.Kurosawa, T. Nakamura and Y. Uwamino, Thick Target Yield Measurements in TIARA, KEK and HIMAC
    Proc. 3rd Specialists Mtg. on Shielding Aspects of Accel., Targets Facilities(SATIF-3), Sendai 83 -94 1997年 [査読無し][通常論文]
  • T. Nakamura, M. Takada, N. Nakao, M. Baba, T. Twasaki, H. Nakashima, Sh. Tanaka, S. Meigo, Y. Sakamoto, Y. nakane, Su. Tanaka, T. Uwamino and N. Nakanishi, Neutron facility for Shielding and Cross-Section Experiments in Japan
    Proc. 3rd Specialists Mtg. on Shielding Aspects of Accel., Targets Facilities(SATIF-3), Sendai 211 -217 1997年 [査読無し][通常論文]
  • Y. Sakamoto, H. Nakashima, Y. Uwamino, N. Nakao, H. Handa, T. Nakamura, T. Shibata, Sh. Tanaka, Su. Tanaka, Y. Nakane, H. Takada, S. Meigo, K. Shin, M. Baba, M. Nakao, T. Okubo, S. Sato, D. Perry, K. Hayashi, M. Saitou, K. Yamada and T. Abe, Bulk Shiel・・・
    Proc. 3rd Specialists Mtg. on Shielding Aspects of Accel., Targets and Irradiation Facilities(SATIF-3), Sendai 199 -206 1997年 [査読無し][通常論文]
     
    Y. Sakamoto, H. Nakashima, Y. Uwamino, N. Nakao, H. Handa, T. Nakamura, T. Shibata, Sh. Tanaka, Su. Tanaka, Y. Nakane, H. Takada, S. Meigo, K. Shin, M. Baba, M. Nakao, T. Okubo, S. Sato, D. Perry, K. Hayashi, M. Saitou, K. Yamada and T. Abe, Bulk Shielding Ecperiments at TIARA and ISIS
  • Point isotropic build-up factors of medium energy neutrons for concrete, iron and a double layer of iron followed by concrete
    K Shin, H Kotegawa, Y Sakamoto, Y Nakane, H Nakashima, S Tanaka, Y Uwamino, S Ban, H Hirayama, S Tanaka RADIATION PROTECTION DOSIMETRY 71 (4) 269 -278 1997年 [査読無し][通常論文]
     
    The neutron build-up factor is newly defined for describing the dose equivalent profiles of medium energy neutrons (E-n less than or equal to 400 MeV) in shields of concrete, iron and a double-layered shield of iron + concrete. The definition of the build-up factor is made in a straightforward way which is analogous to that of gamma rays. The obtained neutron build-up factors are parameterised by empirical expressions. Systematics of the parameters in the expressions and removal cross sections which are used instead of the linear attenuation coefficients in gamma ray cases, are examined regarding the neutron energy.
  • Y Nakane, H Nakashima, Y Sakamoto, S Tanaka RADIATION MEASUREMENTS 28 (1-6) 479 -482 1997年 [査読無し][通常論文]
     
    Reaction rate distributions in a plastic phantom were measured with solid state nuclear track detectors and a fission counter for 40- and 65-MeV quasi-monoenergetic neutrons generated by the Li-7(p,n) reactions with 43- and 68-MeV protons at AVF cyclotron of Japan Atomic Energy Research Institute. Measured distributions were compared with calculated ones.
  • K. Shin, S. Ono, K. Ishibashi, S. Meigo, H. Takada, N. Sasa, H. Nakashima, Sh. Tanaka, N. Nako, T.Kurosawa, T. Nakamura and Y. Uwamino, Thick Target Yield Measurements in TIARA, KEK and HIMAC
    Proc. 3rd Specialists Mtg. on Shielding Aspects of Accel., Targets Facilities(SATIF-3), Sendai 83 -94 1997年 [査読無し][通常論文]
  • T. Nakamura, M. Takada, N. Nakao, M. Baba, T. Twasaki, H. Nakashima, Sh. Tanaka, S. Meigo, Y. Sakamoto, Y. nakane, Su. Tanaka, T. Uwamino and N. Nakanishi, Neutron facility for Shielding and Cross-Section Experiments in Japan
    Proc. 3rd Specialists Mtg. on Shielding Aspects of Accel., Targets Facilities(SATIF-3), Sendai 211 -217 1997年 [査読無し][通常論文]
  • Y. Sakamoto, H. Nakashima, Y. Uwamino, N. Nakao, H. Handa, T. Nakamura, T. Shibata, Sh. Tanaka, Su. Tanaka, Y. Nakane, H. Takada, S. Meigo, K. Shin, M. Baba, M. Nakao, T. Okubo, S. Sato, D. Perry, K. Hayashi, M. Saitou, K. Yamada and T. Abe, Bulk Shiel・・・
    Proc. 3rd Specialists Mtg. on Shielding Aspects of Accel., Targets and Irradiation Facilities(SATIF-3), Sendai 199 -206 1997年 [査読無し][通常論文]
     
    Y. Sakamoto, H. Nakashima, Y. Uwamino, N. Nakao, H. Handa, T. Nakamura, T. Shibata, Sh. Tanaka, Su. Tanaka, Y. Nakane, H. Takada, S. Meigo, K. Shin, M. Baba, M. Nakao, T. Okubo, S. Sato, D. Perry, K. Hayashi, M. Saitou, K. Yamada and T. Abe, Bulk Shielding Ecperiments at TIARA and ISIS
  • Approximate description of dose attenuation profiles of intermediate energy neutrons .1.
    Y Sakamoto, H Kotegawa, Y Nakane, H Nakashima, A Hasegawa, S Tanaka PROCEEDINGS OF SECOND SPECIALISTS' MEETING ON SHIELDING ASPECTS OF ACCELERATORS, TARGETS AND IRRADIATION FACILITIES (12-13 October) 147 -156 1996年 [査読無し][通常論文]
  • N. Nakao, H. Nakashima, T. Nakamura, Sh. Tanaka, Su. Tanaka, K. Shin, M. Baba, Y. Sakamoto and Y, Nakane, Transmission Through Shields of Quasi-Monoenergetic Neutrons Generated by 43- and 68-Mev Protons -I: Concrete Shielding Experiment and Calculation・・・
    Nucl. Sci. Eng. (124) 228 -242 1996年 [査読無し][通常論文]
     
    N. Nakao, H. Nakashima, T. Nakamura, Sh. Tanaka, Su. Tanaka, K. Shin, M. Baba, Y. Sakamoto and Y, Nakane, Transmission Through Shields of Quasi-Monoenergetic Neutrons Generated by 43- and 68-Mev Protons -I: Concrete Shielding Experiment and Calculation for Practical Application
  • H. Nakashima, N. Nakao, Sh. Tanaka, T. Nakamura, K. Shin, Su. Tanaka, H. Takada, H. Meigo, Y. Nakane, Y. Sakamoto and M. Baba, Transmission Through Shields of Quasi-Monoenergetic Neutrons Generated by 43- and 68-Mev Protons -II: Iron Shielding Experime・・・
    Nucl. Sci. Eng. (124) 243 -257 1996年 [査読無し][通常論文]
     
    H. Nakashima, N. Nakao, Sh. Tanaka, T. Nakamura, K. Shin, Su. Tanaka, H. Takada, H. Meigo, Y. Nakane, Y. Sakamoto and M. Baba, Transmission Through Shields of Quasi-Monoenergetic Neutrons Generated by 43- and 68-Mev Protons -II: Iron Shielding Experiment and Analysis for Investigating Calculation Method and Cross Section Data
  • T. Nakamura, T. Kurosawa, E. Kim, M. Takada, A. Konno, Y. Uwamino, M. Imamura, N. Nakao, T. Shibata, N. Nakanishi, N. Tsujimura, T. Yamano, H. Ohguchi, M. Baba, T. Iwasaki, S. Matsuyam, H. Nakashima, Sh. Tanaka, S. Meigo, Y. Sakamoto, Y. Nakane and Su.・・・
    Proc. 1996 International Congress on Radiation Protection(IRPA9)1-123, Vienna, Austria, 14 -19 1996年 [査読無し][通常論文]
     
    T. Nakamura, T. Kurosawa, E. Kim, M. Takada, A. Konno, Y. Uwamino, M. Imamura, N. Nakao, T. Shibata, N. Nakanishi, N. Tsujimura, T. Yamano, H. Ohguchi, M. Baba, T. Iwasaki, S. Matsuyam, H. Nakashima, Sh. Tanaka, S. Meigo, Y. Sakamoto, Y. Nakane and Su. Tanaka, Instrumentation and Dosimetry at Accelerator Facilities,
    April 1996
  • 馬場 護、岩崎 智彦、清住 武秀、名内 泰志、吉岡 正博、松山 成男、中村 尚司、田中 進、中島 宏、明午 伸一郎、田中 俊一、中尾 徳晶 7Li(p, n)中性子源の特性測定
    原子核研究 41 (3) 3 -7 1996年 [査読無し][通常論文]
  • キム ウンジュ、中村 尚司、今野 敦子、今村 峯尾、柴田 徳思、柴田 誠一、上蓑 義朋、中西 紀喜、田中 進、中島 宏、田中 俊一 中性子核破砕断面積の測定(Bi、C、A1)
    原子核研究 41 (3) 21 -27 1996年 [査読無し][通常論文]
  • 今村峯雄、柴田誠一、中尾徳晶、柴田徳思、キム ウンジュ、中村 尚司、上蓑 義朋、田中 進、田中 俊一、中島 宏、Kunihiro Nishizumi、Marc Caffee 中性子放射化断面積の測定(2)-長半減期放射性核種の生成断面積-
    原子核研究 41 (3) 29 -33 1996年 [査読無し][通常論文]
  • 明午 伸一郎、高田 弘、中島 宏、佐々 俊信、田中 進、秦 和夫、小野 慎二 厚いターゲットからの生成中性子スペクトル測定と解析
    原子核研究 41 (3) 49 -57 1996年 [査読無し][通常論文]
  • 小野 慎二、秦 和夫、高田 弘、明午 伸一郎、中島 宏、佐々 俊信、田中 進 荷電粒子による中性子生成率の系統性
    原子核研究 41 (3) 59 -64 1996年 [査読無し][通常論文]
  • 中尾 誠、中村 尚司、中尾 徳晶、作屋 義昌、名内 泰志、田中 進、坂本 幸夫、中島 宏、中根 桂弘 40,65MeV準単色中性子に対するポリエチレン遮蔽体透過実験
    原子核研究 41 (3) 71 -75 1996年 [査読無し][通常論文]
  • 作屋 義昌、岩崎 智彦、平川 直弘、坂本 幸夫、中島 宏、田中 進 90MeV中性子によるポリエチレン内237Np反応率分布
    原子核研究 41 (3) 77 -82 1996年 [査読無し][通常論文]
  • 中根 佳弘、中島 宏、坂本 幸夫、田中 俊一 プラスチックファントム内での中性子反応率分布
    原子核研究 41 (3) 83 -87 1996年 [査読無し][通常論文]
  • 坂本 幸夫、田中 進、中島 宏、中根 桂弘、明午 伸一郎、高田 弘、田中 俊一、高田 真志、黒沢 忠弘、中村 尚司、中尾 徳晶、上蓑 義朋、今村 峯雄 迷路漏洩実験の線源中性子スペクトル
    原子核研究 41 (3) 95 -99 1996年 [査読無し][通常論文]
  • 田中 進、中島 宏、中根 桂弘、坂本 幸夫、明午 伸一郎、田中 俊一、高田 真志、黒沢 忠弘、中村 尚司、中尾 徳晶、今村 峯雄、上蓑 義朋、秦 和夫、平山 英夫 迷路漏洩線の測定-第2軽イオン室内迷路漏洩線の測定-
    原子核研究 41 (3) 101 -112 1996年 [査読無し][通常論文]
  • 馬場 護、名内 泰志、清住 武秀、岩崎 智彦、佐波 俊哉、松山 成男、茨木 正信、中村 尚司、田中 進、中島 宏 中性子による荷電粒子生成断面積の測定
    原子核研究 41 (3) 113 -117 1996年 [査読無し][通常論文]
  • Approximate description of dose attenuation profiles of intermediate energy neutrons .1.
    Y Sakamoto, H Kotegawa, Y Nakane, H Nakashima, A Hasegawa, S Tanaka PROCEEDINGS OF SECOND SPECIALISTS' MEETING ON SHIELDING ASPECTS OF ACCELERATORS, TARGETS AND IRRADIATION FACILITIES (12-13 October) 147 -156 1996年 [査読無し][通常論文]
  • N. Nakao, H. Nakashima, T. Nakamura, Sh. Tanaka, Su. Tanaka, K. Shin, M. Baba, Y. Sakamoto and Y, Nakane, Transmission Through Shields of Quasi-Monoenergetic Neutrons Generated by 43- and 68-Mev Protons -I: Concrete Shielding Experiment and Calculation・・・
    Nucl. Sci. Eng. (124) 228 -242 1996年 [査読無し][通常論文]
     
    N. Nakao, H. Nakashima, T. Nakamura, Sh. Tanaka, Su. Tanaka, K. Shin, M. Baba, Y. Sakamoto and Y, Nakane, Transmission Through Shields of Quasi-Monoenergetic Neutrons Generated by 43- and 68-Mev Protons -I: Concrete Shielding Experiment and Calculation for Practical Application
  • H. Nakashima, N. Nakao, Sh. Tanaka, T. Nakamura, K. Shin, Su. Tanaka, H. Takada, H. Meigo, Y. Nakane, Y. Sakamoto and M. Baba, Transmission Through Shields of Quasi-Monoenergetic Neutrons Generated by 43- and 68-Mev Protons -II: Iron Shielding Experime・・・
    Nucl. Sci. Eng. (124) 243 -257 1996年 [査読無し][通常論文]
     
    H. Nakashima, N. Nakao, Sh. Tanaka, T. Nakamura, K. Shin, Su. Tanaka, H. Takada, H. Meigo, Y. Nakane, Y. Sakamoto and M. Baba, Transmission Through Shields of Quasi-Monoenergetic Neutrons Generated by 43- and 68-Mev Protons -II: Iron Shielding Experiment and Analysis for Investigating Calculation Method and Cross Section Data
  • T. Nakamura, T. Kurosawa, E. Kim, M. Takada, A. Konno, Y. Uwamino, M. Imamura, N. Nakao, T. Shibata, N. Nakanishi, N. Tsujimura, T. Yamano, H. Ohguchi, M. Baba, T. Iwasaki, S. Matsuyam, H. Nakashima, Sh. Tanaka, S. Meigo, Y. Sakamoto, Y. Nakane and Su.・・・
    Proc. 1996 International Congress on Radiation Protection(IRPA9)1-123, Vienna, Austria, 14 -19 1996年 [査読無し][通常論文]
     
    T. Nakamura, T. Kurosawa, E. Kim, M. Takada, A. Konno, Y. Uwamino, M. Imamura, N. Nakao, T. Shibata, N. Nakanishi, N. Tsujimura, T. Yamano, H. Ohguchi, M. Baba, T. Iwasaki, S. Matsuyam, H. Nakashima, Sh. Tanaka, S. Meigo, Y. Sakamoto, Y. Nakane and Su. Tanaka, Instrumentation and Dosimetry at Accelerator Facilities,

    April 1996
  • MEASUREMENTS OF RESPONSE FUNCTION OF ORGANIC LIQUID SCINTILLATOR FOR NEUTRON ENERGY-RANGE UP TO 135 MEV
    N NAKAO, T NAKAMURA, M BABA, Y UWAMINO, N NAKANISHI, H NAKASHIMA, S TANAKA NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 362 (2-3) 454 -465 1995年08月 [査読無し][通常論文]
     
    Neutron response functions of 12.7 cm diameter by 12.7 cm long BC501A organic liquid scintillator have been measured for energy range up to 135 MeV continuously with the TOF method. The measured response functions were compared with Monte Carlo calculations using some codes which are widely used. The comparison showed good agreement below 20 MeV, but some discrepancy above 20 MeV, owing to the inaccurate cross sections of carbon reactions and light yields of produced charged particles. Finally, the new response matrix which covered from 0 to 120 MeV based on the measured data was constructed by the help of calculation data.
  • N NAKAO, T NAKAMURA, M BABA, Y UWAMINO, N NAKANISHI, H NAKASHIMA, S TANAKA NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 362 (2-3) 454 -465 1995年08月 [査読無し][通常論文]
     
    Neutron response functions of 12.7 cm diameter by 12.7 cm long BC501A organic liquid scintillator have been measured for energy range up to 135 MeV continuously with the TOF method. The measured response functions were compared with Monte Carlo calculations using some codes which are widely used. The comparison showed good agreement below 20 MeV, but some discrepancy above 20 MeV, owing to the inaccurate cross sections of carbon reactions and light yields of produced charged particles. Finally, the new response matrix which covered from 0 to 120 MeV based on the measured data was constructed by the help of calculation data.
  • T. Nakamura, E. Kim, A. Konno, M. Imamura, N. Nakao, Y. Uwamino, N. Nakanishi, Su. Tanaka, H. Nakashima, Sh. Tanaka and M. Baba, Activation Cross Section Measurements Using Quasi-Monoenergetic Neutron Fields from 20 to 150 Mev
    Proc. of OECD/NEA Specialists' Meeting on Shielding Aspects of Accelerators, Targets and Irradiation Facilities, Geneva (12-13 October) 215 -220 1995年 [査読無し][通常論文]
  • T. Nakamura, E. Kim, A. Konno, M. Imamura, N. Nakao, Y. Uwamino, N. Nakanishi, Su. Tanaka, H. Nakashima, Sh. Tanaka and M. Baba, Activation Cross Section Measurements Using Quasi-Monoenergetic Neutron Fields from 20 to 150 Mev
    Proc. of OECD/NEA Specialists' Meeting on Shielding Aspects of Accelerators, Targets and Irradiation Facilities, Geneva (12-13 October) 215 -220 1995年 [査読無し][通常論文]
  • T. Nakamura, T. S. Soewarsono, T. Uno, N. Nakao, M. Imamura, T. Ishikawa, Sh. Tanaka, H. Nakashima, Su. Tanaka, M. Baba and T. Iwasaki, Development of p-Li Quasi-Monoenergetic Neutron Field Between 20 and 90 MeV for Cross Section and Shielding Experiments
    Proc. of the 8th Int. Conf. on Radiation Shielding. Arlington, 24-28 April, 1994 1 264 -271 1994年 [査読無し][通常論文]
  • N. Nakao, T Nakamura, M. Takada, S. Tanaka, H. Nakashima, Y. Sakamoto, Y. Nakane, Su. Tanaka, K. Shin, E. Tanabe, T. Shibata, Y. Uwamino and M. Baba, Spectrometry of Several Tens Mev Neutrons Penetrating Shields Using Organic Liquid Scintillator at 90 ・・・
    Proc. of the 8th Int. Conf. on Radiation Shielding, Arlington, 24-28 April, 1994 1 272 -279 1994年 [査読無し][通常論文]
     
    N. Nakao, T Nakamura, M. Takada, S. Tanaka, H. Nakashima, Y. Sakamoto, Y. Nakane, Su. Tanaka, K. Shin, E. Tanabe, T. Shibata, Y. Uwamino and M. Baba, Spectrometry of Several Tens Mev Neutrons Penetrating Shields Using Organic Liquid Scintillator at 90 Mev AVF Cyclotron Facility, TIARA
  • Y. Sakamoto, H. Nakashima, T. Nakane, Sh. Tanaka, Su. Tanaka, T. Nakamura, M. Baba, N. Nakao and K. Shin, Shielding Experiments with Quasi-Monoenergetic Neutrons Between 15 and 90 MeV at90 MV AVF Cyclotron Facility TIARA
    Proc. of the 8th Int. Conf. on Radiation Shielding. Arlington, 24-28 April, 1994 2 809 -815 1994年 [査読無し][通常論文]
  • M. Baba, T. Kiyosumi. T. Iwasaki, M. Yoshioka, S. Matsuyama, N. Hirakawa, T. Nakamura, Su. Tanaka, R. Tanaka, Sh. Tanaka, H. Nakashima, and S. Meigo Characterization and Application of 20-90 MeV 7Li(p, N)Neutron Source at TIARA
    Proc. of Int. Conf. on Nuclear Data for Science and Technology, Gatlinburg, May 9-13 90 -92 1994年 [査読無し][通常論文]
  • S. Tanaka, T. Nakamura and JAERI-University Collaboration Working Group for Accelerator Shielding Study. Shielding Experiments and Analysis at 90 MV AVF Cyclotron Facility, TIARA
    Proc. of OECD/NEA Specialists' Meeting on shielding Aspects of Accelerators, Targets and Irradiation Facilities, Arlington, 28-29 April 195 -204 1994年 [査読無し][通常論文]
  • T. Nakamura, T. S. Soewarsono, T. Uno, N. Nakao, M. Imamura, T. Ishikawa, Sh. Tanaka, H. Nakashima, Su. Tanaka, M. Baba and T. Iwasaki, Development of p-Li Quasi-Monoenergetic Neutron Field Between 20 and 90 MeV for Cross Section and Shielding Experime・・・
    Proc. of the 8th Int. Conf. on Radiation Shielding. Arlington, 24-28 April, 1994 1 264 -271 1994年 [査読無し][通常論文]
     
    T. Nakamura, T. S. Soewarsono, T. Uno, N. Nakao, M. Imamura, T. Ishikawa, Sh. Tanaka, H. Nakashima, Su. Tanaka, M. Baba and T. Iwasaki, Development of p-Li Quasi-Monoenergetic Neutron Field Between 20 and 90 MeV for Cross Section and Shielding Experiments
  • N. Nakao, T Nakamura, M. Takada, S. Tanaka, H. Nakashima, Y. Sakamoto, Y. Nakane, Su. Tanaka, K. Shin, E. Tanabe, T. Shibata, Y. Uwamino and M. Baba, Spectrometry of Several Tens Mev Neutrons Penetrating Shields Using Organic Liquid Scintillator at 90 ・・・
    Proc. of the 8th Int. Conf. on Radiation Shielding, Arlington, 24-28 April, 1994 1 272 -279 1994年 [査読無し][通常論文]
     
    N. Nakao, T Nakamura, M. Takada, S. Tanaka, H. Nakashima, Y. Sakamoto, Y. Nakane, Su. Tanaka, K. Shin, E. Tanabe, T. Shibata, Y. Uwamino and M. Baba, Spectrometry of Several Tens Mev Neutrons Penetrating Shields Using Organic Liquid Scintillator at 90 Mev AVF Cyclotron Facility, TIARA
  • Y. Sakamoto, H. Nakashima, T. Nakane, Sh. Tanaka, Su. Tanaka, T. Nakamura, M. Baba, N. Nakao and K. Shin, Shielding Experiments with Quasi-Monoenergetic Neutrons Between 15 and 90 MeV at90 MV AVF Cyclotron Facility TIARA
    Proc. of the 8th Int. Conf. on Radiation Shielding. Arlington, 24-28 April, 1994 2 809 -815 1994年 [査読無し][通常論文]
  • M. Baba, T. Kiyosumi. T. Iwasaki, M. Yoshioka, S. Matsuyama, N. Hirakawa, T. Nakamura, Su. Tanaka, R. Tanaka, Sh. Tanaka, H. Nakashima, and S. Meigo Characterization and Application of 20-90 MeV 7Li(p, N)Neutron Source at TIARA
    Proc. of Int. Conf. on Nuclear Data for Science and Technology, Gatlinburg, May 9-13 90 -92 1994年 [査読無し][通常論文]
  • S. Tanaka, T. Nakamura and JAERI-University Collaboration Working Group for Accelerator Shielding Study. Shielding Experiments and Analysis at 90 MV AVF Cyclotron Facility, TIARA
    Proc. of OECD/NEA Specialists' Meeting on shielding Aspects of Accelerators, Targets and Irradiation Facilities, Arlington, 28-29 April 195 -204 1994年 [査読無し][通常論文]

共同研究・競争的資金等の研究課題

  • 日本学術振興会:科学研究費助成事業 基盤研究(B)
    研究期間 : 2009年 -2011年 
    代表者 : 中島 宏, 柴田 徳思, 春日井 好己, 岩元 洋介, 松田 規宏, 大島 武, 中村 尚司, 平山 英夫, 伴 秀一, 佐波 俊哉, 萩原 雅之, 岩瀬 広, 八島 浩, 関本 俊, 大石 晃嗣, 石橋 健二, 執行 伸寛
     
    米国フェルミ国立加速器研究所における高エネルギー加速器施設において、120GeV陽子で生成した二次粒子線を用いた物質内粒子線挙動測定実験を行った。このデータを元に、高エネルギー加速器施設開発、宇宙線照射効果研究などにかかる、高エネルギー粒子輸送計算システム開発を行うと共に、粒子線照射効果評価法の確立に関する基礎研究を行った。
  • 日本学術振興会:科学研究費助成事業 基盤研究(B)
    研究期間 : 2007年 -2008年 
    代表者 : 中島 宏, 坂本 幸夫, 岩元 洋介, 松田 規宏, 中村 尚司, 平山 英夫, 松村 宏, 谷口 真吾, 八島 浩, 柴田 徳思, 中根 佳弘, 増川 史洋, 春日井 好己, 大石 晃嗣, 石橋 健二, 執行 伸寛
     
    米国フェルミ国立加速器研究所における高エネルギー加速器施設において、120GeV陽子で生成した二次粒子線を用いた物質内粒子線挙動測定実験を行い、高エネルギー加速器施設開発、宇宙線照射効果研究などにかかる、高エネルギー粒子輸送計算システム開発に資すると共に、粒子線照射効果評価法を確立に関する基礎データを取得した。


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