Mar. 2016, Physical Society of Japan, 10th Young Scientist Award (Division of Nuclear Theory)　　　　　　　　　　　　　　　
Kosuke Nomura

Mar. 2012, Springer, Springer Theses Prize　　　　　　　　　　　　　　　
Kosuke Nomura

Mar. 2012, School of Science, The University of Tokyo, Dean's Award (for Ph.D.)　　　　　　　　　　　　　　　
Kosuke Nomura

Mar. 2009, School of Science, The University of Tokyo, Dean's Award (for M.Sc.)　　　　　　　　　　　　　　　
Kosuke Nomura

Lifetime measurements to investigate γ softness in 198Pt and 200Pt
A. Esmaylzadeh, F. Von Spee, J. Jolie, K. Nomura, M. Ley, C. Fransen, A. Blazhev, S. Dantanarayana, M. Droste, J. Fischer, L. Knafla, C.-D Lakenbrink, R. Novak, A. Pfeil
Nuclear Physics A, 1071, 123395, 123395, Elsevier BV, Apr. 2026, [Peer-reviewed]
Scientific journal, 49995788

Effects of shape coexistence and configuration mixing on low-lying states in tellurium isotopes
Kosuke Nomura
Physical Review C, 113, 034310-1, 034310-16, 09 Mar. 2026, [Peer-reviewed], [Lead author, Last author, Corresponding author]
Scientific journal, 49995788

Neutrinoless ββ decay in the interacting boson model based on the nuclear energy density functionals
Kosuke Nomura
Physical Review C, 112, 5, 054310, 054310, American Physical Society (APS), 13 Nov. 2025, [Peer-reviewed], [Lead author, Last author, Corresponding author]
Scientific journal, 49995788

Configuration mixing effects on neutrinoless ββ-decay nuclear matrix elements
Kosuke Nomura
Physics Letters B, 871, 139995, 139995, Elsevier BV, Nov. 2025, [Peer-reviewed], [Lead author, Last author, Corresponding author]
Scientific journal, 49995788

Mapped spdf interacting boson model for quadrupole-octupole collective states in nuclei
K. Nomura
Physical Review C, 112, 4, 044307-1, 044307-15, American Physical Society (APS), 10 Oct. 2025, [Peer-reviewed], [Lead author, Last author, Corresponding author]
Scientific journal

Microscopic determination of the interacting boson-fermion model Hamiltonian from the nuclear energy density functional
M. Homma, K. Nomura
Physics Letters B, 869, 139880-1, 139880-5, Elsevier BV, Sep. 2025, [Peer-reviewed], [Last author, Corresponding author]
Scientific journal, 49995788

Shape transition and shape coexistence in odd-mass nuclei around ¹⁰⁰Zr
Jean-Marc Régis, Aaron Pfeil, Jan Jolie, Arwin Esmaylzadeh, Lukas Knafla, Mario Ley, Andreas Harter, Vasil Karayonchev, Ulli Köster, Yung Hee Kim, Noam Gavrielov, Kosuke Nomura
EPJ Web of Conferences, 329, 01007, 01007, EDP Sciences, 25 Jun. 2025, [Peer-reviewed], [Last author]
International conference proceedings, The A = 100 mass region is of special interest due to a rapid shape transition from nearly spherical to strongly deformed shapes by going from neutron number 58 to 60, especially pronounced in the Sr and Zr isotopes. The sudden change of the ground-state deformation can be explained by an evolution of the single particle energies with increased proton and neutron occupation and an additional spin orbital partner interaction which leads to a change of the order of the single particle energies. Another explanation is given by the interplay between normal spherical and well deformed intruder configurations which lead to shape coexistence and sudden inversion of the ground-state configuration at N = 60. To further examine this intricate phenomenon, lifetimes of low-lying excited states in the nuclei ⁹⁹Zr and ⁹⁹Nb were determined using the γ-γ fast-timing techniques and an experimental setup consisting of four LaBr₃(Ce) detectors. Neutron rich A = 99 fragments were produced in neutron-induced fission and delivered by the LOHENGRIN fission-fragment separator at the Institut Laue-Langevin in Grenoble, France. The experimental results are compared to two different calculations in the framework of the interacting boson-fermion model and discussed in the context of shape transition and shape coexistence.

Quadrupole-octupole coupling and the onset of octupole collectivity
Kosuke Nomura
EPJ Web of Conferences, 329, 02010, 02010, EDP Sciences, 25 Jun. 2025, [Peer-reviewed], [Lead author, Last author, Corresponding author]
International conference proceedings, Octupole deformation and collective excitations are studied within the interacting boson model. By using the results of the self-consistent mean-field calculations with a universal energy density functional, the Hamiltonian of the interacting s, d, and f boson system is completely determined. A global systematic study confirms that significant octupole effects are present in actinide, lanthanide, and rare-earth nuclei corresponding to particular nucleon numbers for which octupole correlations are empirically suggested to be enhanced.

Mapped interacting boson model for nuclear structure studies
Kosuke Nomura
The European Physical Journal A, 61, 6, 139-1, 139-39, Springer Science and Business Media LLC, 17 Jun. 2025, [Peer-reviewed], [Invited], [Lead author, Last author, Corresponding author]
Scientific journal, 49995788

Sensitivity analysis of β-decay half-life predictions for Ge, As, Zr, and Mo nuclei within the mapped interacting boson model
M. Homma, K. Nomura
Physical Review C, 111, 4, 044302-1, 044302-16, American Physical Society (APS), 03 Apr. 2025, [Peer-reviewed], [Last author, Corresponding author]
Scientific journal

Increasing Octupole Collectivity across the Z=64 Isotopic Chain: B(E3) Values in Gd150
S. Pascu, E. Yüksel, Abhishek, P. Stevenson, G. H. Bhat, R. N. Mao, K. Nomura, C. Costache, Z. P. Li, N. Mărginean, C. Mihai, T. Naz, Zs. Podolyák, P. H. Regan, A. E. Turturică, R. Borcea, M. Boromiza, D. Bucurescu, S. Călinescu, C. Clisu, A. Coman, I. Dinescu, S. Doshi, D. Filipescu, N. M. Florea, A. Gandhi, I. Gheorghe, A. Ionescu, R. Lică, R. Mărginean, R. E. Mihai, A. Mitu, N. Nazir, A. Negret, C. R. Niţă, E. B. O’Sullivan, C. Petrone, S. E. Poulton, J. A. Sheikh, H. K. Singh, L. Stan, S. Toma, G. Turturică, S. Ujeniuc
Physical Review Letters, 134, 092501-1, 092501-7, 04 Mar. 2025, [Peer-reviewed]
Scientific journal

Collective excitations in Gd150
S. Pascu, E. Yüksel, Abhishek, P. Stevenson, G. H. Bhat, R. N. Mao, K. Nomura, C. Costache, Z. P. Li, N. Mărginean, C. Mihai, T. Naz, N. Paar, Zs. Podolyák, P. H. Regan, A. E. Turturică, R. Borcea, M. Boromiza, D. Bucurescu, S. Călinescu, C. Clisu, A. Coman, I. Dinescu, S. Doshi, D. Filipescu, N. M. Florea, A. Gandhi, I. Gheorghe, A. Ionescu, R. Lică, R. Mărginean, R. E. Mihai, A. Mitu, N. Nazir, A. Negret, C. R. Niţă, E. B. O'Sullivan, C. Petrone, S. E. Poulton, J. A. Sheikh, H. K. Singh, L. Stan, S. Toma, G. Turturică, S. Ujeniuc
Physical Review C, 111, 034302-1, 034302-17, 04 Mar. 2025, [Peer-reviewed]
Scientific journal

Nuclear size, electric monopole transitions, and the location of 02+ states
B. Maheshwari, K. Nomura, P. Van Isacker
Physical Review C, 111, 024317-1, 024317-9, 26 Feb. 2025, [Peer-reviewed]
Scientific journal

Quadrupole-hexadecapole correlations in neutron-rich samarium and gadolinium isotopes
L. Lotina, K. Nomura, R. Rodríguez-Guzmán, L. M. Robledo
Physical Review C, 111, 024301-1, 024301-11, 03 Feb. 2025, [Peer-reviewed], [Corresponding author]
Scientific journal

Role of octupole shape degree of freedom in neutron-rich odd-mass xenon isotopes
K. Nomura
Physical Review C, 110, 064306-1, 064306-12, 03 Dec. 2024, [Peer-reviewed], [Lead author, Corresponding author]
Scientific journal

Shape transition and coexistence in Te isotopes studied with the quadrupole collective Hamiltonian based on a relativistic energy density functional
K. Suzuki, K. Nomura
Physical Review C, 110, 064304-1, 064304-16, 02 Dec. 2024, [Peer-reviewed], [Last author, Corresponding author]
Scientific journal

Effects of pairing strength on the nuclear structure and double-β decay predictions within the mapped interacting boson model
K. Nomura
Physical Review C, 110, 2, 024304-1, 024304-19, American Physical Society (APS), 08 Aug. 2024, [Peer-reviewed], [Lead author, Corresponding author]
Scientific journal

Collectivity at the prolate-oblate transition: The 2_1^+ lifetime of 190W
E. Şahin, V. Werner, A.K. Mistry, M. Rudigier, K. Nomura, J. Jolie, N. Pietralla, P.H. Regan, G. Ağgez, H.M. Albers, U. Ahmed, Ö. Aktaş, A. Algora, S. Alhomaidhi, C. Appleton, T. Arıcı, M. Armstrong, A. Banerjee, J. Benito, G. Benzoni, A. Blazhev, P. Boutachkov, A.M. Bruce, B. Cederwall, M.M.R. Chishti, M.L. Cortés, F. Crespi, B. Das, T. Davinson, T. Dickel, M. Doncel, A. Ertoprak, A. Esmaylzadeh, L.M. Fraile, E.R. Gamba, J. Gerl, M. Górska, J. Ha, E. Haettner, O. Hall, H. Heggen, C. Hornung, N. Hubbard, S. Jazrawi, P.R. John, C.E. Jones, V. Karayonchev, E. Kazantseva, R. Kern, L. Knafla, I. Kojouharov, P. Koseoglou, G. Kosir, D. Kostyleva, N. Kurz, N. Kuzminchuk, M. Llanos-Expósito, R. Lozeva, D. Mengoni, T.J. Mertzimekis, M. Mikolajczuk, A.I. Morales, I. Mukha, J.R. Murias, B.S. Nara-Singh, S.E.A. Orrigo, J. Pellumaj, S. Pelonis, S. Pietri, S. Pigliapoco, Zs. Podolyák, M. Polettini, K. Rezynkina, H.A. Rösch, H. Schaffner, Ch. Scheidenberger, L. Sexton, P.-A. Söderström, Y.K. Tanaka, J.J. Valiente-Dobón, P. Vasileiou, J. Vasiljević, J. Vesic, H. Weick, J. Wiederhold, A. Yaneva, G. Zhang, J. Zhao, A. Zyriliou
Physics Letters B, 857, 138976, 138976, Elsevier BV, Aug. 2024, [Peer-reviewed]
Scientific journal

Weakening of N = 28 shell gap and the nature of 0+2 states
Bhoomika Maheshwari, Kosuke Nomura
Journal of Physics G: Nuclear and Particle Physics, 51, 9, 095101, 095101, IOP Publishing, 26 Jul. 2024, [Peer-reviewed], [Last author]
Scientific journal, Abstract

The work reports a novel application of the interacting boson model in light-mass region around ⁴⁸Ca, that takes into account intruder states and configuration mixing. The model is shown to provide a reasonable description of the observed low-lying yrast and yrare states of the N = 28 even–even isotones from Si to Fe, and even–even Ca isotopes. The nature of states is addressed in terms of the competition between spherical and deformed intruder configurations, and the rigidity of the N = 28 shell gap is tested, particularly for ⁴⁴S. The isomer in ⁴⁴S is shown to arise from a weak mixing between the two configurations and called as shape isomer. The unresolved low-lying spectra in ⁴⁶Ar is also approached using the core-excitations across N = 28 shell. The SU(3) structure in ⁴²Si is supported by the present calculation. The nearly spherical nature of ⁵⁰Ti, ⁵²Cr, ⁵⁴Fe and ^42,44,46Ca isotopes is found, while the core excitations are found to be essential for the description of yrare states. Shell model calculation is also performed for comparison.

Parameter dependence of the β-decay properties of neutron-rich Zr isotopes within the interacting boson model
M. Homma, K. Nomura
Physical Review C, 110, 1, 014303-1, 014303-15, American Physical Society (APS), 01 Jul. 2024, [Peer-reviewed], [Last author, Corresponding author]
Scientific journal

Microscopic description of hexadecapole collectivity in even-even rare-earth nuclei near N=90
L. Lotina, K. Nomura
Physical Review C, 044324-1, 044324-14, 22 Apr. 2024, [Peer-reviewed], [Last author, Corresponding author]
Scientific journal

Systematic shell-model study for structure and isomeric states in 200−210Po isotopes
Sakshi Shukla, Praveen C. Srivastava, Kosuke Nomura, Larry Zamick
Nuclear Physics A, 1044, 122842, 122842, Elsevier BV, Apr. 2024, [Peer-reviewed]
Scientific journal

Low-energy structure and β -decay properties of neutron-rich nuclei in the region of a shape phase transition
Kosuke Nomura
Physical Review C, 034319-1, 034319-18, 27 Mar. 2024, [Peer-reviewed], [Lead author, Last author, Corresponding author]
Scientific journal

Impacts of hexadecapole deformations on the collective energy spectra of axially deformed nuclei
L. Lotina, K. Nomura
Physical Review C, 109, 3, 034304-1, 034304-6, American Physical Society (APS), 05 Mar. 2024, [Peer-reviewed], [Last author, Corresponding author]
Scientific journal

Investigating the prolate-to-oblate shape phase transition: Lifetime measurements and γ spectroscopy of the low-lying negative parity structure in 193Os
L. Knafla, K. Nomura, A. Esmaylzadeh, A. Harter, J. Jolie, V. Karayonchev, Y. H. Kim, U. Köster, M. Ley, C. Michelagnoli, A. Pfeil, J.-M. Régis, F. von Spee
Physical Review C, 109, 1, American Physical Society (APS), 10 Jan. 2024, [Peer-reviewed]
Scientific journal

Coulomb excitation of 96Mo
R. Russell, J. Heery, J. Henderson, C. R. Hoffman, T. Beck, C. Cousins, P. Farris, A. Gade, S. A. Gillespie, A. Hill, H. Iwasaki, S. Kisyov, A. N. Kuchera, B. Longfellow, C. Müller-Gatermann, K. Nomura, E. Rubino, R. Salinas, A. Sanchez, D. Weisshaar, C. Y. Wu, J. Wu
Physical Review C, 108, 6, American Physical Society (APS), 19 Dec. 2023, [Peer-reviewed]
Scientific journal

Octupole deformation in 143,145,146Ba
N.T. Brewer, E.H. Wang, W.A. Yzaguirre, J.H. Hamilton, K. Nomura, A.V. Ramayya, S.H. Liu, J.K. Hwang, B.M. Musangu, J.M. Eldridge, C.J. Zachary, Y.X. Luo, J.O. Rasmussen, S.J. Zhu, C. Goodin, G.M. Ter-Akopian, A.V. Daniel, Yu.Ts. Oganessian
Nuclear Physics A, 1039, 122738, 122738, Elsevier BV, Nov. 2023, [Peer-reviewed]
Scientific journal

Lifetime measurements in 99Nb and 99Zr: Investigation of shape coexistence
A. Pfeil, K. Nomura, N. Gavrielov, J.-M. Régis, U. Köster, Y. H. Kim, A. Esmaylzadeh, A. Harter, J. Jolie, L. Knafla, M. Ley, V. Karayonchev
Physical Review C, 108, 3, 034310-1, 034310-14, American Physical Society (APS), 19 Sep. 2023, [Peer-reviewed]
Scientific journal

Classical and Bayesian error analysis of the relativistic mean-field model for doubly magic nuclei
M. Imbrišak, K. Nomura
Physical Review C, 108, 2, 024321-1, 024321-9, American Physical Society (APS), 28 Aug. 2023, [Peer-reviewed], [Last author, Corresponding author]
Scientific journal

Microscopic formulation of the interacting boson model for reflection asymmetric nuclei
Kosuke Nomura
International Journal of Modern Physics E, 2340001, 2340001, World Scientific Pub Co Pte Ltd, 08 Mar. 2023, [Peer-reviewed], [Invited], [Lead author, Last author, Corresponding author]
Scientific journal, Reflection asymmetric, octupole shapes in nuclei are a prominent aspect of nuclear structure, and have been recurrently studied over the decades. Recent experiments using radioactive-ion beams have provided evidence for stable octupole shapes. A variety of nuclear models have been employed for the related theoretical analyses. We review recent studies on the nuclear octupole shapes and collective excitations within the interacting boson model. A special focus is placed on the microscopic formulation of this model by using the mean-field method that is based on the framework of nuclear density functional theory. As an illustrative example, a stable octupole deformation, and a shape phase transition as a function of nucleon number that involves both quadrupole and octupole degrees of freedom are shown to occur in light actinides. Systematic spectroscopic studies indicate enhancement of the octupole collectivity in a wide mass region. Couplings between the octupole and additional degrees of freedom are incorporated in a microscopic manner in the boson system, and shown to play a crucial role in the description of the related intriguing nuclear structure phenomena such as the shape coexistence., 37148188

Stability of the manifold boundary approximation method for reductions of nuclear structure models
M. Imbrišak, K. Nomura
Physical Review C, 107, 3, 034304, 034304, American Physical Society (APS), 07 Mar. 2023, [Peer-reviewed], [Last author, Corresponding author]
Scientific journal

Investigation of γ softness: Lifetime measurements in Ru104,106
A. Esmaylzadeh, A. Blazhev, K. Nomura, J. Jolie, M. Beckers, C. Fransen, R.-B. Gerst, A. Harter, V. Karayonchev, L. Knafla, M. Ley, F. von Spee
Physical Review C, 106, 6, 064323-1, 064323-13, American Physical Society (APS), 21 Dec. 2022, [Peer-reviewed]
Scientific journal

Overview of Seniority Isomers
Bhoomika Maheshwari, Kosuke Nomura
Symmetry, 14, 12, 2680, 2680, MDPI AG, 18 Dec. 2022, [Peer-reviewed], [Last author]
Scientific journal, Nuclear isomers are the metastable excited states of nuclei. The isomers can be categorized into a few classes including spin, seniority, K, shape and fission isomers depending upon the hindrance mechanisms. In this paper, we aim to present an overview of seniority isomers, which is a category related to the seniority quantum number. The discussion is mainly based on the concepts of seniority and generalized seniority. Various aspects of seniority isomers and their whereabouts have been covered along with the situations where seniority mixing prevents the isomerism.

Collective-model description of shape coexistence and intruder states in cadmium isotopes based on a relativistic energy density functional
K. Nomura, K. E. Karakatsanis
Physical Review C, 106, 6, 064317-1, 064317-10, American Physical Society (APS), 15 Dec. 2022, [Peer-reviewed], [Lead author, Corresponding author]
Scientific journal

Simultaneous description of β decay and low-lying structure of neutron-rich even- and odd-mass Rh and Pd nuclei
K. Nomura, L. Lotina, R. Rodríguez-Guzmán, L. M. Robledo
Physical Review C, 106, 6, 064304-1, 064304-17, American Physical Society (APS), 07 Dec. 2022, [Peer-reviewed], [Lead author, Corresponding author]
Scientific journal

Effect of configuration mixing on quadrupole and octupole collective states of transitional nuclei
Kosuke Nomura
Physical Review C, 106, 2, 024330-1, 024330-13, American Physical Society (APS), 26 Aug. 2022, [Peer-reviewed], [Lead author, Last author, Corresponding author]
Scientific journal

Signatures of shape phase transitions in krypton isotopes based on relativistic energy density functionals
K. E. Karakatsanis, K. Nomura
Physical Review C, 105, 6, 064310-1, 064310-14, American Physical Society (APS), 23 Jun. 2022, [Peer-reviewed], [Last author, Corresponding author]
Scientific journal

Octupole correlations in collective excitations of neutron-rich N≈56 nuclei
Kosuke Nomura
Physical Review C, 105, 5, 054318, American Physical Society (APS), 27 May 2022, [Peer-reviewed], [Lead author, Last author, Corresponding author]
Scientific journal

β decay and evolution of low-lying structure in Ge and As nuclei
Kosuke Nomura
Physical Review C, 105, 4, American Physical Society ({APS}), 08 Apr. 2022, [Peer-reviewed], [Lead author, Last author, Corresponding author]
Scientific journal

Two-neutrino double- β decay in the mapped interacting boson model
Kosuke Nomura
Physical Review C, 105, 4, American Physical Society ({APS}), 04 Apr. 2022, [Peer-reviewed], [Lead author, Last author, Corresponding author]
Scientific journal

Questioning the wobbling interpretation of low-spin bands in γ -soft nuclei within the interacting boson-fermion model
K. Nomura, C. M. Petrache
Physical Review C, 105, 2, American Physical Society (APS), 18 Feb. 2022, [Lead author, Corresponding author]
Scientific journal

Linking Partial Dynamical Symmetry to Nuclear Energy Density Functional
A. Leviatan, N. Gavrielov, K. Nomura
Bulgarian Journal of Physics, 49, 1, 067, 077, Union of Physicists in Bulgaria, 11 Feb. 2022, [Peer-reviewed]
International conference proceedings

γ-ray spectroscopy of low-lying yrast and non-yrast states in neutron-rich Kr94,95,96
R.-B. Gerst, A. Blazhev, K. Moschner, P. Doornenbal, A. Obertelli, K. Nomura, J.-P. Ebran, S. Hilaire, J. Libert, G. Authelet, H. Baba, D. Calvet, F. Château, S. Chen, A. Corsi, A. Delbart, J.-M. Gheller, A. Giganon, A. Gillibert, V. Lapoux, T. Motobayashi, M. Niikura, N. Paul, J.-Y. Roussé, H. Sakurai, C. Santamaria, D. Steppenbeck, R. Taniuchi, T. Uesaka, T. Ando, T. Arici, F. Browne, A. M. Bruce, R. Caroll, L. X. Chung, M. L. Cortés, M. Dewald, B. Ding, F. Flavigny, S. Franchoo, M. Górska, A. Gottardo, J. Jolie, A. Jungclaus, J. Lee, M. Lettmann, B. D. Linh, J. Liu, Z. Liu, C. Lizarazo, S. Momiyama, S. Nagamine, N. Nakatsuka, C. R. Nita, C. Nobs, L. Olivier, R. Orlandi, Z. Patel, Zs. Podolyák, M. Rudigier, T. Saito, C. Shand, P.-A. Söderström, I. Stefan, V. Vaquero, V. Werner, K. Wimmer, Z. Xu
Physical Review C, 105, 2, American Physical Society (APS), 03 Feb. 2022, [Peer-reviewed]
Scientific journal

Quadrupole-octupole collectivity in the Xe, Ba, Ce and Nd isotopic chains described with mean field and beyond approaches
R Rodríguez-Guzmán, L M Robledo, K Nomura, N Cruz Hernandez
Journal of Physics G: Nuclear and Particle Physics, {IOP} Publishing, 01 Jan. 2022, [Peer-reviewed]
Scientific journal

Lifetime measurements to investigate γ softness and shape coexistence in Mo102
A. Esmaylzadeh, V. Karayonchev, K. Nomura, J. Jolie, M. Beckers, A. Blazhev, A. Dewald, C. Fransen, R.-B. Gerst, G. Häfner, A. Harter, L. Knafla, M. Ley, L. M. Robledo, R. Rodríguez-Guzmán, M. Rudigier
Physical Review C, 104, 6, American Physical Society (APS), 15 Dec. 2021, [Peer-reviewed]
Scientific journal

Quadrupole-octupole coupling and the evolution of collectivity in neutron-deficient Xe, Ba, Ce, and Nd isotopes
K. Nomura, R. Rodríguez-Guzmán, L. M. Robledo
Physical Review C, 104, 5, American Physical Society (APS), 29 Nov. 2021, [Peer-reviewed], [Lead author, Corresponding author]
Scientific journal

Evolution of octupole deformation and collectivity in neutron-rich lanthanides
K. Nomura, R. Rodríguez-Guzmán, L. M. Robledo, J. E. García-Ramos, N. C. Hernández
Physical Review C, 104, 4, American Physical Society (APS), 21 Oct. 2021, [Peer-reviewed], [Lead author, Corresponding author]
Scientific journal

Partial dynamical symmetry from energy density functionals
K. Nomura, N. Gavrielov, A. Leviatan
Physical Review C, 104, 4, American Physical Society ({APS}), 14 Oct. 2021, [Peer-reviewed], [Lead author, Corresponding author]
Scientific journal

Interplay between pairing and triaxial shape degrees of freedom in Os and Pt nuclei
K. Nomura, D. Vretenar, Z. P. Li, J. Xiang
Physical Review C, 104, 2, American Physical Society (APS), 19 Aug. 2021, [Peer-reviewed], [Lead author, Corresponding author]
Scientific journal

Coupling of pairing and triaxial shape vibrations in collective states of γ -soft nuclei
K. Nomura, D. Vretenar, Z. P. Li, J. Xiang
Physical Review C, 103, 5, American Physical Society (APS), 25 May 2021, [Peer-reviewed], [Lead author, Corresponding author]
Scientific journal

Microscopic description of octupole collective excitations near N=56 and N=88
K. Nomura, L. Lotina, T. Nikšić, D. Vretenar
Physical Review C, 103, 5, American Physical Society ({APS}), 03 May 2021, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

Quadrupole-octupole coupling and the onset of octupole deformation in actinides
K. Nomura, R. Rodríguez-Guzmán, L. M. Robledo, J. E. García-Ramos
Physical Review C, 103, 4, American Physical Society (APS), 12 Apr. 2021, [Peer-reviewed], [Lead author, Corresponding author]
Scientific journal

Octupole correlations in light actinides from the interacting boson model based on the Gogny energy density functional
K. Nomura, R. Rodríguez-Guzmán, Y. M. Humadi, L. M. Robledo, J. E. García-Ramos
Physical Review C, 28 Dec. 2020, [Peer-reviewed], [Lead author, Corresponding author]
Scientific journal

Signatures of octupole shape phase transitions in radioactive nuclei
Kosuke Nomura
Journal of Physics: Conference Series, 1643, 012152, 012152, {IOP} Publishing, Dec. 2020
Scientific journal

Pairing vibrations in the interacting boson model based on density functional theory
K. Nomura, D. Vretenar, Z. P. Li, J. Xiang
Physical Review C, 10 Nov. 2020, [Peer-reviewed], [Lead author, Corresponding author]
Scientific journal

Shape phase transitions in odd−A Zr isotopes
K. Nomura, T. Nikšić, D. Vretenar
Physical Review C, 10 Sep. 2020
Scientific journal

β decay of even- A nuclei within the interacting boson model with input based on nuclear density functional theory
K. Nomura, R. Rodríguez-Guzmán, L. M. Robledo
Physical Review C, 30 Apr. 2020
Scientific journal

Structure of odd-odd Cs isotopes within the interacting boson-fermion-fermion model based on the Gogny-D1M energy density functional
K. Nomura, R. Rodríguez-Guzmán, L. M. Robledo
Physical Review C, 101, 1, American Physical Society ({APS}), 08 Jan. 2020
Scientific journal

Beyond Mean-field Boson–Fermion Description of Odd Nuclei
K. Nomura
Acta Physica Polonica B Proceedings Supplement, 13, 3, 457, 457, Jagiellonian University, 2020, [Peer-reviewed]
English, Scientific journal

Lifetime measurements and shape coexistence in Sr97
A. Esmaylzadeh, J.-M. R{\'{e } }gis, Y. H. Kim, U. Köster, J. Jolie, V. Karayonchev, L. Knafla, K. Nomura, L. M. Robledo, R. Rodr{\'{\i } }guez-Guzm{\'{a } }n
Physical Review C, 100, 6, American Physical Society ({APS}), 13 Dec. 2019
English, Scientific journal

Shape coexistence in Hg178
C. Müller-Gatermann, A. Dewald, C. Fransen, K. Auranen, H. Badran, M. Beckers, A. Blazhev, T. Braunroth, D. M. Cullen, G. Fruet, A. Goldkuhle, T. Grahn, P. T. Greenlees, A. Herz{\'{a } },{\v{n } }, U. Jakobsson, D. Jenkins, J. Jolie, R. Julin, S. Juutinen, J. Konki, M. Leino, J. Litzinger, K. Nomura, J. Pakarinen, P. Peura, M. G. Procter, P. Rahkila, P. Ruotsalainen, M. S, zelius, J. Sar{\'{e } }n, C. Scholey, J. Sorri, S. Stolze, M. J. Taylor, J. Uusitalo, K. O. Zell
Physical Review C, 99, 5, American Physical Society ({APS}), 21 May 2019
English, Scientific journal

Spectroscopy of odd-odd nuclei within the interacting boson-fermion-fermion model based on the Gogny energy-density functional
K. Nomura, R. Rodr{\'{\i } }guez-Guzm{\'{a } }n, L. M. Robledo
Physical Review C, 99, 3, American Physical Society ({APS}), 07 Mar. 2019
English, Scientific journal

Two-neutron transfer reactions and shape phase transitions in the microscopically formulated interacting boson model
K. Nomura, Y. Zhang
Physical Review C, 99, 2, American Physical Society ({APS}), 26 Feb. 2019
English, Scientific journal

Coexistence and evolution of shapes: mean-field-based interacting boson model
Kosuke Nomura
EPJ Web of Conferences, 223, 01046, 01046, {EDP} Sciences, 2019
Scientific journal, A method of deriving the Hamiltonian of the interacting boson model, that is based on the microscopic framework of the nuclear energy density functional, is presented. The constrained self-consistent mean-field calculation with a given energy density functional provides potential energy surface within the relevant collective coordinates, which is subsequently mapped onto the expectation value of the interacting-boson Hamiltonian in the boson condensate state. This procedure completely determines the strength parameters of the IBM, and the diagonalization of the mapped Hamiltonian yields excitation spectra and transition rates for a given nucleus. Two recent applications of the method are discussed, that is, the descriptions of the intruder states in Cadmiumisotopes and the octupole correlations in neutron-rich odd-mass Barium isotopes.

Beyond-mean-field Boson-fermion Description of Odd-mass Nuclei
K. Nomura
Nuclear Physics Review, 35, 4, 499, 504, Dec. 2018, [Peer-reviewed], [Lead author, Last author, Corresponding author]
International conference proceedings

Structure of even-even cadmium isotopes from the beyond-mean-field interacting boson model
K. Nomura, J. Jolie
Physical Review C, 98, 2, American Physical Society ({APS}), 01 Aug. 2018
English, Scientific journal

Prolate-to-oblate shape phase transitions in neutron-rich odd-mass nuclei
K. Nomura, R. Rodr{\'{\i } }guez-Guzm{\'{a } }n, L. M. Robledo
Physical Review C, 97, 6, American Physical Society ({APS}), 20 Jun. 2018
English, Scientific journal

Description of neutron-rich odd-mass krypton isotopes within the interacting boson-fermion model based on the Gogny energy density functional
K. Nomura, R. Rodr{\'{\i } }guez-Guzm{\'{a } }n, L. M. Robledo
Physical Review C, 97, 6, American Physical Society ({APS}), 18 Jun. 2018
English, Scientific journal

Signatures of octupole correlations in neutron-rich odd-mass barium isotopes
K. Nomura, T. Nik{\v{s } }i{\'{c } }, D. Vretenar
Physical Review C, 97, 2, American Physical Society ({APS}), 16 Feb. 2018
English, Scientific journal

Shape transitions in odd-mass γ -soft nuclei within the interacting boson-fermion model based on the Gogny energy density functional
K. Nomura, R. Rodr{\'{\i } }guez-Guzm{\'{a } }n, L. M. Robledo
Physical Review C, 96, 6, American Physical Society ({APS}), 20 Dec. 2017
English, Scientific journal

Neutron-proton pairing and double- β decay in the interacting boson model
P. Van Isacker, J. Engel, K. Nomura
Physical Review C, 96, 6, American Physical Society ({APS}), 04 Dec. 2017
English, Scientific journal

Structure of krypton isotopes within the interacting boson model derived from the Gogny energy density functional
K. Nomura, R. Rodr{\'{\i } }guez-Guzm{\'{a } }n, Y. M. Humadi, L. M. Robledo, H. Abusara
Physical Review C, 96, 3, American Physical Society ({APS}), 08 Sep. 2017
English, Scientific journal

Description of odd-mass nuclei within the interacting boson-fermion model based on the Gogny energy density functional
K. Nomura, R. Rodr{\'{\i } }guez-Guzm{\'{a } }n, L. M. Robledo
Physical Review C, 96, 1, 14314, 14314, American Physical Society ({APS}), 21 Jul. 2017
English, Scientific journal, Spectroscopic properties of odd-mass nuclei are studied within the framework of the interacting boson-fermion model (IBFM) with parameters based on the Hartree-Fock-Bogoliubov (HFB) approximation. The parametrization D1M of the Gogny energy density functional (EDF) was used at the mean-field level to obtain the deformation energy surfaces for the considered nuclei in terms of the quadrupole deformations (β,γ). In addition to the energy surfaces, both single-particle energies and occupation probabilities were used as a microscopic input for building the IBFM Hamiltonian. Only three strength parameters for the particle-boson-core coupling are fitted to experimental spectra. The IBFM Hamiltonian is then used to compute the energy spectra and electromagnetic transition rates for selected odd-mass Eu and Sm nuclei as well as for 195Pt and 195Au. A reasonable agreement with the available experimental data is obtained for the considered odd-mass nuclei.

Shape-phase transitions in odd-mass γ -soft nuclei with mass A≈130
K. Nomura, T. Nik{\v{s } }i{\'{c } }, D. Vretenar
Physical Review C, 96, 1, 14304, 14304, American Physical Society ({APS}), 07 Jul. 2017
English, Scientific journal, Quantum phase transitions between competing equilibrium shapes of nuclei with an odd number of nucleons are explored using a microscopic framework of nuclear energy density functionals and a fermion-boson coupling model. The boson Hamiltonian for the even-even core nucleus, as well as the spherical single-particle energies and occupation probabilities of unpaired nucleons, are completely determined by a constrained self-consistent mean-field calculation for a specific choice of the energy density functional and pairing interaction. Only the strength parameters of the particle-core coupling have to be adjusted to reproduce a few empirical low-energy spectroscopic properties of the corresponding odd-mass system. The model is applied to the odd-A Ba, Xe, La, and Cs isotopes with mass A≈130, for which the corresponding even-even Ba and Xe nuclei present a typical case of γ-soft nuclear potential. The theoretical results reproduce the experimental low-energy excitation spectra and electromagnetic properties, and confirm that a phase transition between nearly spherical and γ-soft nuclear shapes occurs also in the odd-A systems.

Structural evolution in germanium and selenium nuclei within the mapped interacting boson model based on the Gogny energy density functional
K. Nomura, R. Rodr{\'{\i } }guez-Guzm{\'{a } }n, L. M. Robledo
Physical Review C, 95, 6, 64310, 64310, American Physical Society ({APS}), 13 Jun. 2017
English, Scientific journal, The shape transitions and shape coexistence in the Ge and Se isotopes are studied within the interacting boson model (IBM) with the microscopic input from a self-consistent mean-field calculation based on the Gogny-D1M energy density functional. The mean-field energy surface as a function of the quadrupole shape variables β and γ, obtained from the constrained Hartree-Fock-Bogoliubov method, is mapped onto the expectation value of the IBM Hamiltonian with configuration mixing in the boson condensate state. The resultant Hamiltonian is used to compute excitation energies and electromagnetic properties of the selected nuclei 66–94Ge and 68–96Se. Our calculation suggests that many nuclei exhibit γ softness. Coexistence between prolate and oblate shapes, as well as between spherical and γ-soft shapes, is also observed. The method provides a reasonable description of the observed systematics of the excitation energy of the low-lying energy levels and transition strengths for nuclei below the neutron shell closure N=50, and provides predictions on the spectroscopy of neutron-rich Ge and Se isotopes with 52≤N≤62, where data are scarce or not available.

γ-ray spectroscopy of low-lying excited states and shape competition inOs194
T. Daniel, S. Kisyov, P. H. Regan, N. Marginean, Zs. Podoly{\'{a } }k, R. Marginean, K. Nomura, M. Rudigier, R. Mihai, V. Werner, R. J. Carroll, L. A. Gurgi, A. Oprea, T. Berry, A. Serban, C. R. Nita, C. Sotty, R. Suvaila, A. Turturica, C. Costache, L. Stan, A. Olacel, M. Boromiza, S. Toma
Physical Review C, 95, 2, American Physical Society ({APS}), 28 Feb. 2017
English, Scientific journal

Signatures of shape phase transitions in odd-mass nuclei
K. Nomura, T. Nik{\v{s } }i{\'{c } }, D. Vretenar
Physical Review C, 94, 6, American Physical Society ({APS}), 08 Dec. 2016
English, Scientific journal

Excited states and reduced transition probabilities in Os168
T. Grahn, S. Stolze, D. T. Joss, R. D. Page, B. Say{\u{g } },{\i}, D. O{\textquotesingle}Donnell, M. Akmali, K. Andgren, L. Bianco, D. M. Cullen, A. Dewald, P. T. Greenlees, K. Heyde, H. Iwasaki, U. Jakobsson, P. Jones, D. S. Judson, R. Julin, S. Juutinen, S. Ketelhut, M. Leino, N. Lumley, P. J. R. Mason, O. Möller, K. Nomura, M. Nyman, A. Petts, P. Peura, N. Pietralla, Th. Pissulla, P. Rahkila, P. J. Sapple, J. Sar{\'{e } }n, C. Scholey, J. Simpson, J. Sorri, P. D. Stevenson, J. Uusitalo, H. V. Watkins, J. L. Wood
Physical Review C, 94, 4, American Physical Society ({APS}), 28 Oct. 2016
English, Scientific journal

Structural evolution inA≈100nuclei within the mapped interacting boson model based on the Gogny energy density functional
K. Nomura, R. Rodr{\'{\i } }guez-Guzm{\'{a } }n, L. M. Robledo
Physical Review C, 94, 4, 044314, American Physical Society ({APS}), 17 Oct. 2016, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

Beyond-mean-field boson-fermion model for odd-mass nuclei
K. Nomura, T. Nik{\v{s } }i{\'{c } }, D. Vretenar
Physical Review C, 93, 5, American Physical Society ({APS}), 02 May 2016
English, Scientific journal

Nuclear structure of 96,98Mo: Shape coexistence and mixed-symmetry states
T. Thomas, V. Werner, J. Jolie, K. Nomura, T. Ahn, N. Cooper, H. Duckwitz, A. Fitzler, C. Fransen, A. Gade, M. Hinton, G. Ilie, K. Jessen, A. Linnemann, P. Petkov, N. Pietralla, D. Radeck
Nuclear Physics A, 947, 203, 233, Elsevier {BV}, Mar. 2016
English, Scientific journal

Shape coexistence in the microscopically guided interacting boson model
K Nomura, T Otsuka, P Van Isacker
Journal of Physics G: Nuclear and Particle Physics, 43, 2, 024008, 024008, {IOP} Publishing, 01 Feb. 2016, [Peer-reviewed], [Invited], [Lead author, Corresponding author]
Scientific journal

Microscopic analysis of pear-shaped nuclei
K. Nomura
AIP Conference Proceedings, 1681, 040009, AIP Publishing LLC, 15 Oct. 2015, [Peer-reviewed], [Lead author, Last author, Corresponding author]
International conference proceedings

Spectroscopy of quadrupole and octupole states in rare-earth nuclei from a Gogny force
K. Nomura, R. Rodr{\'{\i } }guez-Guzm{\'{a } }n, L. M. Robledo
Physical Review C, 92, 1, American Physical Society ({APS}), 17 Jul. 2015, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

Advances in the Microscopic Study of the Interacting Boson Model
Kosuke Nomura
Proceedings of the Conference on Advances in Radioactive Isotope Science (ARIS2014), Journal of the Physical Society of Japan, 30 Jun. 2015
Scientific journal

Evolution ofE2transition strength in deformed hafnium isotopes from new measurements onHf172,Hf174, andHf176
M. Rudigier, K. Nomura, M. Dannhoff, R-B. Gerst, J. Jolie, N. Saed-Samii, S. Stegemann, J-M. R{\'{e } }gis, L. M. Robledo, R. Rodr{\'{\i } }guez-Guzm{\'{a } }n, A. Blazhev, Ch. Fransen, N. Warr, K. O. Zell
Physical Review C, 91, 4, American Physical Society ({APS}), 02 Apr. 2015, [Peer-reviewed]
English, Scientific journal

Microscopic and Algebraic Theory for Complex Nuclear Shapes and Dynamics　　　　　　　　　　　　　　　
K. Nomura
Bulgarian Journal of Physics, 42, 344, 353, 2015, [Peer-reviewed], [Lead author, Last author, Corresponding author]
International conference proceedings

Microscopic analysis of quadrupole-octupole shape evolution
Kosuke Nomura
EPJ Web of Conferences, 93, 01007, 01007, {EDP} Sciences, 2015
English, Scientific journal

Microscopic description of octupole shape-phase transitions in light actinide and rare-earth nuclei
K. Nomura, D. Vretenar, T. Nik{\v{s } }i{\'{c } }, Bing-Nan Lu
Physical Review C, 89, 2, American Physical Society ({APS}), 24 Feb. 2014, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

Evidence for shape coexistence in98Mo
T. Thomas, K. Nomura, V. Werner, T. Ahn, N. Cooper, H. Duckwitz, M. Hinton, G. Ilie, J. Jolie, P. Petkov, D. Radeck
Physical Review C, 88, 4, American Physical Society ({APS}), 07 Oct. 2013
English, Scientific journal

Microscopic analysis of the octupole phase transition in Th isotopes
K. Nomura, D. Vretenar, B.-N. Lu
Physical Review C, 88, 2, American Physical Society ({APS}), 19 Aug. 2013
English, Scientific journal

Interacting boson model with energy density functionals
K Nomura
Journal of Physics: Conference Series, 445, 012015, 012015, {IOP} Publishing, 03 Jul. 2013
English, Scientific journal

Shape evolution and the role of intruder configurations in Hg isotopes within the interacting boson model based on a Gogny energy density functional
K. Nomura, R. Rodr{\'{\i } }guez-Guzm{\'{a } }n, L. M. Robledo
Physical Review C, 87, 6, American Physical Society ({APS}), 21 Jun. 2013
English, Scientific journal

INTERACTING BOSON MODEL FROM MEAN-FIELD THEORY: APPLICATION TO TRIAXIAL NUCLEI
K. NOMURA
Capture Gamma-Ray Spectroscopy and Related Topics, 121, 126, WORLD SCIENTIFIC, May 2013, [Peer-reviewed], [Lead author, Last author, Corresponding author]
International conference proceedings

Shape dynamics in neutron-rich Kr isotopes: Coulomb excitation of 92Kr, 94Kr and 96Kr
M. Albers, K. Nomura, N. Warr, A. Blazhev, J. Jolie, D. Mücher, B. Bastin, C. Bauer, C. Bernards, L. Bettermann, V. Bildstein, J. Butterworth, M. Cappellazzo, J. Cederkäll, D. Cline, I. Darby, S. Das Gupta, J.M. Daugas, T. Davinson, H. De Witte, J. Diriken, D. Filipescu, E. Fiori, C. Fransen, L.P. Gaffney, G. Georgiev, R. Gernhäuser, M. Hackstein, S. Heinze, H. Hess, M. Huyse, D. Jenkins, J. Konki, M. Kowalczyk, T. Kröll, R. Krücken, J. Litzinger, R. Lutter, N. Marginean, C. Mihai, K. Moschner, P. Napiorkowski, B.S. Nara Singh, K. Nowak, J. Pakarinen, M. Pfeiffer, D. Radeck, P. Reiter, S. Rigby, L.M. Robledo, R. Rodr{\'{\i } }guez-Guzm{\'{a } }n, M. Rudigier, M. Scheck, M. Seidlitz, B. Siebeck, G.S. Simpson, P. Thöle, T. Thomas, J. Van de Walle, P. Van Duppen, M. Vermeulen, D. Voulot, R. Wadsworth, F. Wen, er, K. Wimmer, K.O. Zell, M. Zielinska
Nuclear Physics A, 899, 1, 28, Elsevier {BV}, Feb. 2013
English, Scientific journal

Derivation of the Interacting Boson Model from mean-field theory
Kosuke Nomura
Nuclear Structure Problems, 116, 121, WORLD SCIENTIFIC, Dec. 2012, [Peer-reviewed], [Lead author, Last author, Corresponding author]
International conference proceedings

Interacting boson model from energy density functionals: γ-softness and the related topics
K. Nomura
AIP Conference Proceedings, 1491, 170, 173, AIP, 22 Oct. 2012, [Peer-reviewed], [Lead author, Last author, Corresponding author]
International conference proceedings

Interacting boson model from microscopic theory
K. Nomura
AIP Conference Proceedings, 1488, 69, 76, AIP, Oct. 2012, [Peer-reviewed], [Lead author, Last author, Corresponding author]
International conference proceedings

Shape coexistence in lead isotopes in the interacting boson model with a Gogny energy density functional
K. Nomura, R. Rodr{\'{\i } }guez-Guzm{\'{a } }n, L. M. Robledo, N. Shimizu
Physical Review C, 86, 3, American Physical Society ({APS}), 17 Sep. 2012
English, Scientific journal

Shape phase transitions in the interacting boson model: Phenomenological versus microscopic descriptions
J. Kotila, K. Nomura, L. Guo, N. Shimizu, T. Otsuka
Physical Review C, 85, 5, 09 May 2012
English, Scientific journal

Robust Regularity inγ-Soft Nuclei and Its Microscopic Realization
K. Nomura, N. Shimizu, D. Vretenar, T. Nik{\v{s } }i{\'{c } }, T. Otsuka
Physical Review Letters, 108, 13, American Physical Society ({APS}), 30 Mar. 2012
English, Scientific journal

Evidence for a Smooth Onset of Deformation in the Neutron-Rich Kr Isotopes
M. Albers, N. Warr, K. Nomura, A. Blazhev, J. Jolie, D. Mücher, B. Bastin, C. Bauer, C. Bernards, L. Bettermann, V. Bildstein, J. Butterworth, M. Cappellazzo, J. Cederkäll, D. Cline, I. Darby, S. Das Gupta, J. M. Daugas, T. Davinson, H. De Witte, J. Diriken, D. Filipescu, E. Fiori, C. Fransen, L. P. Gaffney, G. Georgiev, R. Gernhäuser, M. Hackstein, S. Heinze, H. Hess, M. Huyse, D. Jenkins, J. Konki, M. Kowalczyk, T. Kröll, R. Krücken, J. Litzinger, R. Lutter, N. Marginean, C. Mihai, K. Moschner, P. Napiorkowski, B. S. Nara Singh, K. Nowak, T. Otsuka, J. Pakarinen, M. Pfeiffer, D. Radeck, P. Reiter, S. Rigby, L. M. Robledo, R. Rodr{\'{\i } }guez-Guzm{\'{a } }n, M. Rudigier, P. Sarriguren, M. Scheck, M. Seidlitz, B. Siebeck, G. Simpson, P. Thöle, T. Thomas, J. Van de Walle, P. Van Duppen, M. Vermeulen, D. Voulot, R. Wadsworth, F. Wen, er, K. Wimmer, K. O. Zell, M. Zielinska
Physical Review Letters, 108, 6, American Physical Society ({APS}), 10 Feb. 2012
English, Scientific journal

Collective structural evolution in neutron-rich Yb, Hf, W, Os, and Pt isotopes
K. Nomura, T. Otsuka, R. Rodr{\'{\i } }guez-Guzm{\'{a } }n, L. M. Robledo, P. Sarriguren
Physical Review C, 84, 5, American Physical Society ({APS}), 21 Nov. 2011
English, Scientific journal

Quadrupole collective dynamics from energy density functionals: Collective Hamiltonian and the interacting boson model
K. Nomura, T. Nik{\v{s } }i{\'{c } }, T. Otsuka, N. Shimizu, D. Vretenar
Physical Review C, 84, 1, American Physical Society ({APS}), 06 Jul. 2011
English, Scientific journal

Spectroscopic calculations of the low-lying structure in exotic Os and W isotopes
K. Nomura, T. Otsuka, R. Rodr{\'{\i } }guez-Guzm{\'{a } }n, L. M. Robledo, P. Sarriguren, P. H. Regan, P. D. Stevenson, Zs. Podoly{\'{a } }k
Physical Review C, 83, 5, American Physical Society ({APS}), 09 May 2011
English, Scientific journal

Microscopic formulation of the interacting boson model for rotational nuclei (vol 83, 041302, 2011)
Kosuke Nomura, Takaharu Otsuka, Noritaka Shimizu, Lu Guo
PHYSICAL REVIEW C, 83, 5, May 2011, [Peer-reviewed]
English, Scientific journal

Microscopic derivation of IBM and structural evolution in nuclei
Nomura, Kosuke
AIP Conference Proceedings, AIP, May 2011, [Peer-reviewed], [Lead author, Last author, Corresponding author]
English, Scientific journal, A Hamiltonian of the interacting boson model (IBM) is derived based on the mean-field calculations with nuclear energy density functionals (EDFs). The multi-nucleon dynamics of the surface deformation is simulated in terms of the boson degrees of freedom. The interaction strengths of the IBM Hamiltonian are determined by mapping the potential energy surfaces (PESs) of a given EDF with quadrupole degrees of freedom onto the corresponding PES of IBM. A fermion-to-boson mapping for a rotational nucleus is discussed in terms of the rotational response, which reflects a specific time-dependent feature. Ground-state correlation energy is evaluated as a signature of structural evolution. Some examples resulting from the present spectroscopic calculations are shown for neutron-rich Pt, Os and W isotopes including exotic ones.

Microscopic formulation of the interacting boson model for rotational nuclei
Kosuke Nomura, Takaharu Otsuka, Noritaka Shimizu, Lu Guo
Physical Review C, 83, 4, 25 Apr. 2011, [Peer-reviewed], [Lead author]
English, Scientific journal

Structural evolution in Pt isotopes with the interacting boson model Hamiltonian derived from the Gogny energy density functional
K. Nomura, T. Otsuka, R. Rodr{\'{\i } }guez-Guzm{\'{a } }n, L. M. Robledo, P. Sarriguren
Physical Review C, 83, 1, American Physical Society ({APS}), 25 Jan. 2011, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

Derivation of IBM Hamiltonian for deformed nuclei
Kosuke Nomura, Takaharu Otsuka, Noritaka Shimizu, Lu Guo
Journal of Physics: Conference Series, 267, 012050, 012050, 01 Jan. 2011
English, Scientific journal

Formulating the interacting boson model by mean-field methods
Kosuke Nomura, Noritaka Shimizu, Takaharu Otsuka
Physical Review C, 81, 4, 12 Apr. 2010, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

Mean-Field Derivation of the Interacting Boson Model Hamiltonian and Exotic Nuclei (vol 101, art no 142501, 2008)
Kosuke Nomura, Noritaka Shimizu, Takaharu Otsuka
PHYSICAL REVIEW LETTERS, 102, 6, Feb. 2009, [Peer-reviewed]
English, Scientific journal

NEW FORMULATION OF INTERACTING BOSON MODEL AND HEAVY EXOTIC NUCLEI　　　　　　　　　　　　　　　
K. Nomura, N. Shimizu, T. Otsuka
Acta Physica Polônia B, 40, 3, 603, 606, 2009, [Peer-reviewed], [Lead author, Corresponding author]
International conference proceedings

New Microscopic Derivation of the Interacting Boson Model and Its Applications to Exotic Nuclei
K. Nomura, N. Shimizu, T. Otsuka
AIP Conference Proceedings, AIP, 2009, [Lead author, Corresponding author]
International conference proceedings

New Microscopic foundation of Interacting Boson Model and collectivities in exotic nuclei
K. Nomura, N. Shimizu, T. Otsuka
AIP Conference Proceedings, AIP, 2009, [Lead author, Corresponding author]
International conference proceedings

Mean-Field Derivation of the Interacting Boson Model Hamiltonian and Exotic Nuclei
Kosuke Nomura, Noritaka Shimizu, Takaharu Otsuka
Physical Review Letters, 101, 14, American Physical Society ({APS}), 29 Sep. 2008, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

24pZF-14 Low-lying collective states of heavy unstable nuclei
Nomura K., Otsuka T., Shimizu N., Meeting abstracts of the Physical Society of Japan, 63, 1, 81, 81, 29 Feb. 2008
The Physical Society of Japan (JPS), Japanese

22pZD-12 Shape phase transitions and critical point symmetries in neutron-rich nuclei
Nomura Kosuke, Otsuka Takaharu, Shimizu Noritaka, Meeting abstracts of the Physical Society of Japan, 62, 2, 86, 86, 21 Aug. 2007
The Physical Society of Japan (JPS), Japanese

Chirality and Wobbling in Atomic Nuclei　　　　　　　　　　　　　　　
Kosuke Nomura, Chapter 11
CRC Press, Dec. 2024, 9781032691282, [Contributor]

Interacting boson model from energy density functionals
Nomura, Kosuke
Springer, 2013, 9784431542339, xiii, 188 p., English, [Single work]

Quantum Mechanics Exercise I　　　　　　　　　　　　　　　
Hokkaido University
Apr. 2024 - Present

Quantum Mechanics I　　　　　　　　　　　　　　　
Hokkaido University
Apr. 2024 - Present

Physics II　　　　　　　　　　　　　　　
Hokkaido University
Oct. 2023 - Present

Introduction to Modern Physics　　　　　　　　　　　　　　　
Hokkaido University
Apr. 2023 - Present

Nuclear Physics I　　　　　　　　　　　　　　　
Hokkaido University
Apr. 2023 - Present

Nuclear Physics　　　　　　　　　　　　　　　
Hokkaido University
Apr. 2023 - Present

Physics I　　　　　　　　　　　　　　　
Hokkaido University
Apr. 2023 - Sep. 2023

Numerical Methods and Mathematical Modelings　　　　　　　　　　　　　　　
Department of Physics, Faculty of Science, University of Zagreb
Mar. 2020 - Feb. 2023, Undergraduate special subjects, Croatia

Theoretical Nuclear Structure　　　　　　　　　　　　　　　
Department of Physics, Faculty of Science, University of Zagreb
Mar. 2020 - Feb. 2023, Postgraduate courses, Croatia

Nuclear Structure　　　　　　　　　　　　　　　
Department of Physics, Faculty of Science, University of Zagreb
Oct. 2019 - Feb. 2023, Undergraduate special subjects, Croatia

Jan. 2020 - Present
European Physical Society　　　　　　　　　　　　　　　

Jan. 2020 - Present
American Physical Society　　　　　　　　　　　　　　　

2007 - Present
Japanese Physical Society　　　　　　　　　　　　　　　

中重核のエキゾチックな変形と稀崩壊の統一的研究
科学研究費助成事業
Apr. 2025 - Mar. 2030
野村 昂亮
日本学術振興会, 基盤研究(C), 北海道大学, Principal investigator, 25K07293

Exotic Nuclear Structure and Dynamics
Tenure-Track Pilot Programme
May 2019 - Feb. 2023
Kosuke Nomura
Croatian Ministry of Science and Education, Croatian Science Foundation, and Swiss Federal Institute of Technology in Lausanne, Faculty of Science, University of Zagreb, Croatia, Principal investigator

Uncertainty Quantification within the Nuclear Energy Density Functional Framework　　　　　　　　　　　　　　　
May 2019 - 2022
Croatian Science Foundation, Faculty of Science, University of Zagreb, Croatia, Coinvestigator

重い不安定核構造の理論研究　　　　　　　　　　　　　　　
Excellent Young Researcher
Apr. 2018 - Mar. 2020
野村昂亮
Ministry of Education, Culture, Sports, Science and Technology, Japan Atomic Energy Agency, Principal investigator

QuantiXLie Center of Excellence　　　　　　　　　　　　　　　
May 2019
Croatian government and European Union, Coinvestigator

原子核の集団運動とエキゾチック核構造に関する理論的研究
Grants-in-Aid for Scientific Research Grant-in-Aid for JSPS Fellows
Apr. 2016 - Mar. 2018
野村 昂亮
今年度も前年度に引き続き、核子多体系の微視的理論である密度汎関数理論DFTに基づいた相互作用するボソン模型IBMの枠組みにおいて、原子核の集団励起を記述する研究を行った。今年度は先ず、DFT平均場計算からIBMハミルトニアンを導き、不安定核ビームを用いた実験研究において重要な、中性子過剰Ge, Se, Kr同位体の分光学的性質を記述した。特に、核子数の変化に伴う原子核形状と励起状態の遷移、いわゆる量子相転移と、異なる変形状態の共存（変形共存）状態を系統的に調べ、それらを特徴付ける励起状態エネルギーや電磁遷移などの物理量を計算した。理論的予言も行い、将来の不安定核実験のための重要な指針となりうる。さらに、前年度から継続して、この方法を奇核（陽子数または中性子が奇数）に拡張する研究にも取り組んだ。具体的には、偶偶核（陽子数、中性子数ともに偶数）をコアとしてそれに単一核子の自由度を加え、両者の間の相互作用をDFT計算に基づいて決定する。今年度は、Ba, Xeなどの、偶偶核コアが非軸対称変形した奇核の分光学的性質、特に量子相転移の秩序変数と考えられるいくつかの物理量を計算した。奇核構造の理解はベータ崩壊などの基本的な崩壊過程の記述にも不可欠である。近年、奇核の励起状態に関する多くの実験データが生み出されている一方、それらの微視的かつ系統的な記述は、特に中重核領域では理論的に非常に困難である。本研究で開発した手法は、中重領域の奇核構造への有力なアプローチといえる。それとは独立に、２重ベータ崩壊の研究も行った。対相関基底を用いた殻模型空間からアイソスピン自由度を考慮したボソン模型空間への写像によって、pf殻領域の原子核のボソンハミルトニアンと２重ベータ崩壊演算子を構築し、同崩壊過程の核行列要素を計算した。特に、ボソン模型における中性子陽子対の重要性を調べた。
Japan Society for the Promotion of Science, Grant-in-Aid for JSPS Fellows, University of Tsukuba, Principal investigator, 16J07651

Microscopic and Algebraic Theory of Nuclei under Extreme Conditions　　　　　　　　　　　　　　　
Seventh Framework Programme Marie-Curie Actions
Sep. 2013 - Aug. 2015
Kosuke Nomura
European Commission, Marie-Curie Intra-European Fellowship, GANIL, CEA, Principal investigator

Unified description of nuclear collective motion and the structure of exotic nuclei　　　　　　　　　　　　　　　
海外特別研究員
Apr. 2012 - Aug. 2013
野村昂亮
Japan Society for the Promotion of Science, University of Cologne, Principal investigator

不安定核の集団運動に関する理論的研究
Grants-in-Aid for Scientific Research Grant-in-Aid for JSPS Fellows
Apr. 2009 - Mar. 2012
野村 昂亮
平均場理論と相互作用するボソン模型(IBM)の関連性という観点から、中重核の4重極集団運動を研究した。平均場理論では原子核の内部固有状態の物理量を計算できるが、励起状態のエネルギーと波動関数を計算するのは一般に難しい。一方IBMは励起状態の物理量をうまく記述できるが現象論的である。そこで、平均場理論から出発してIBMハミルトニアンを導く方法を近年開発した.4重極集団運動に関わる相互作用強度は、核子系からIBM系へのポテンシャルエネルギー面の写像によって導出する。まず、有限レンジのGogny型密度汎関数を用いて、白金近傍の広い範囲の重い原子核に適用した結果、実験で示唆される、4重極変形した原子核の持つ対称性とそれらの間の遷移「形状相転移」をほぼ再現した。さらに、回転に対する核子系のレスポンスをIBM系に写像する方法を考察した。従来のIBMでは現象論的にしか扱われなかった回転の質量:項(LL項)に注目して、平均場理論とIBMの両方でクランキング模型を用いて慣性モーメントを計算し、両者で等しくなるようにLL項のパラメータの値を微視的に決定した。強く軸対称変形した原子核においてイラスト状態のエネルギーを正確に再現することが出来た。相対論的平均場模型(RMF)の有効相互作用に基づいて、集団運動ハミルトニアンとIBMのハミルトニアンを導き、両者の励起状態の性質を比べ、前者における質量項の扱いや後者でのボソン三体力の必要性など、問題点を明らかにした。非相対論的なSkyrme力やRMFの相互作用などの微視的な自由度から出発して非軸対称変形した原子核の構造を調べた。ほぼ全ての非軸対称核は、従来知られてきたガンマ不安定な描像でもrigid triaxialの描像のどちらでもなくちょうどその中間であるという、経験的に知られた系統的性質を再現した。また、この性質を説明するのにボソンの三体力をIBMに導入する必要がある事を示した。
Japan Society for the Promotion of Science, Grant-in-Aid for JSPS Fellows, The University of Tokyo, Principal investigator, 09J07368

原⼦核変形と⼆重ベータ崩壊の新しい関連性が明らかに 〜⾃然界の基本相互作⽤の解明への貢献に期待〜　　　　　　　　　　　　　　　
06 Nov. 2025
Myself
[Others]

奇核形状の相転移の微視的記述に初めて成功 〜重元素合成メカニズム解明への貢献に期待〜
Sep. 2025
Myself
北海道大学
新着情報 プレスリリース, 49995788, [Others]

INNOVATION BOOST FOR CROATIA　　　　　　　　　　　　　　　
Mar. 2020
Other than myself
SDC magazine One World
SDC magazine One World
[Internet]

EPFL News - A partnership to boost researchers' career prospects in Croatia　　　　　　　　　　　　　　　
Jan. 2020
Other than myself
EPFL, Switzerland
[Internet]

ZNANSTVENICI OD MILIJUN EURA Istražuju životinje hrvatskog podzemlja, rudarenje promjenjivog neba i dinamiku egzotičnih atomskih jezgara　　　　　　　　　　　　　　　
25 Nov. 2019
Other than myself
Jutarnji list
[Paper]

原子核の「歪(いびつ)な」変形の謎を解明　　　　　　　　　　　　　　　
Jul. 2012
Myself
東京大学理学部ニュース
[Pr]

Progress of Theoretical and Experimental Physics　　　　　　　　　　　　　　　
May 2016 - Present
Peer review
Peer review etc

Physical Review Letters　　　　　　　　　　　　　　　
Dec. 2015 - Present
Peer review
Peer review etc

Journal of Physics G: Nuclear and Particle Physics　　　　　　　　　　　　　　　
Oct. 2015 - Present
Peer review
Peer review etc

Physics Letters B　　　　　　　　　　　　　　　
Jun. 2015 - Present
Peer review
Peer review etc

Physical Review C　　　　　　　　　　　　　　　
Feb. 2014 - Present
Peer review
Peer review etc

12th Asian Workshop on Nuclear Reaction Database Development　　　　　　　　　　　　　　　
02 Sep. 2025 - 05 Sep. 2025
Planning etc, Panel chair etc
Academic society etc
Nuclear Reaction Data Center, Hokkaido University

The microscopic modelling of odd-mass and odd-odd nuclei　　　　　　　　　　　　　　　
28 Oct. 2024 - 31 Oct. 2024
Panel chair etc
Academic society etc
Espace de Structure et de réactions Nucléaires Théorique, CEA Saclay

10th International Workshop on Quantum Phase Transitions in Nuclei and Many-Body Systems　　　　　　　　　　　　　　　
10 Jul. 2022 - 15 Jul. 2022
Planning etc, Panel chair etc
Academic society etc
University of Zagreb, Croatia, and Hebrew University, Israel

National Fund for Scientific and Technological Development (FONDECYT)　　　　　　　　　　　　　　　
Nov. 2018
Review, Peer review
Review
Chilean National Commission for Scientific and Technological Research (CONICYT)