Researcher Database

Institute of Low Temperature Science Frontier Ice and Snow Science

Researcher Profile and Settings


  • Institute of Low Temperature Science Frontier Ice and Snow Science

Job Title





Research Interests

  • Astrochemistry   ice surface   atoms & molecules   

Research Areas

  • Physics / Atomic/Molecular/Quantum electronics
  • Earth and planetary science / Geochemistry/Astrochemistry


  •        - 1992  Tokyo Metropolitan University  Graduate School, Division of Natural Science
  •        - 1987  Nihon University  Faculty of Science and Engineering

Association Memberships


Research Activities

Published Papers

Conference Activities & Talks

  • Measurements of activation energies for diffusion of hydrogen atom on pure CO solid  [Invited]
    N. Watanabe
    European Conference On Surface Science (ECOSS34)  2018/08
  • Infrared Measurements of Efficient Chemical Desorption of Hydrogen Sulfide from Amorphous Solid Water  [Invited]
    N. Watanabe
    COSPAR 2018, The Evolving Chemical Universe: from proto-stars to the Origin of Life  2018/07
  • Surface Chemistry of the ISM: Experimental Approach to grain surface processes  [Invited]
    N. Watanabe
    The Olympian Symposium 2018 Gas and stars from milli- to mega- parsecs  2018/05
  • H 2ortho-para conversion on amorphous solid water  [Invited]
    N. Watanabe
    International Conference on Photonic Electronic and Atomic Collisions(ICPEAC2017)  2017/07
  • Ortho-to-para nuclear spin conversion of H2 on ice: a key to chemical evolution in space  [Not invited]
    Naoki Watanabe
  • Physicochemical processes on Ice Dust towards Deuterium Enrichment  [Not invited]
    N. Watanabe
    International Symposium on Molecular Spectroscopy  2017/06
  • Physicohemical Processes on ice dust towards deuterium enrichment   [Not invited]
    International Symposium on Molecular Spectroscopy 72ND MEETING  2017/06
  • Ortho-to-para ratios of hydrogen molecules desorbed from ice at around 10 K: What happens on cosmic ice dust?   [Invited]
    N. Watanabe,H. Ueta, T. Hama, A. Kouchi
    The 253thAmerican Chemical Society National Meeting  2017/04
  • Strong temperature dependence of ortho-to-para conversion of H2 on amorphous solid water at around 10 K  [Not invited]
    N. Watanabe
  • Experimental approach to hydrogen chemistry on grain surfaces: molecular formation  [Invited]
    N. Watanabe
    Center for Astrochemical Studies Seminar  2016/10  Max-Planck-Institut für extraterrestrische Physik, Germany
  • Experimental approach to ortho-to-para ratio of hydrogen and water molecules desorbed from ice at around 10 K  [Invited]
    Naoki Watanabe
    Workshop on Astrochemistry in Star and Planet Formation  2016/02  Riken, Saitama, Japan
  • Deuterium chemistry and nuclear spin conversion on grain surfaces: implication to deuterium enrichment  [Invited]
    N. Watanabe
    From clouds to protoplanetary disk: the astrochemical link  2015/10  Hans Harnack Haus, Berlin, Germany
  • Grain Surface Chemistry: What Happens Without Photons and Ions  [Invited]
    N. Watanabe
    A symposium to honor Lou Allamandola’s Contributions to the Molecular Universe  2015/09
  • Experimental Approach to Chemistry of Cosmic Dust  [Invited]
    N. Watanabe
    COST Action Our Astrochemical History CM1401  2015/05  The Czech Republic
  • Experimental approach to nonenergetic physicochemical processes on icy grains  [Invited]
    Naoki Watanabe
    Icy Grain Chemistry for Formation of Complex Organic Molecules: From Molecular Clouds to Protoplanetary Disks, Comets and Meteorites  2015/03  Tokyo Institute of Technology, Japan
  • Diffusion of hydrogen atom on amorphous solid water: Thermal or tunneling?   [Not invited]
    N. Watanabe
    247th ACS Chemistry & Materials for Energy  2014/03  Dallas, USA
  • Physics and chemistry of hydrogen on cosmic dust: diffusion, spin temperatures, and water formation  [Invited]
    N. Watanabe, T. Hama, H. Hidaka, Y. Kimura, A. Kouchi, Y. Oba, V. Pirronello
    First Workshop on Experimental Laboratory Astrophysics  2013/02  Kauai, Hawaii
  • Physicochemical Processes of Hydrogen on Ice: A Key for Chemical Evolution in Space  [Invited]
    N. Watanabe
    2nd International Symposium on Hierarchy and Holism  2013/02  Tokyo, Japan
  • Surface diffusion mechanism of atomic hydrogen and the ortho/para ratio of nascent H2 molecule on amorphous solid water at around 10 K  [Invited]
    N. Watanabe
    International Lorentz Center Workshop: Dynamical Phenomena at Surfaces: The Role of Complexity  2012/11  Leiden, The Netherlands
  • Hydrogen processes on dust grains: H atom diffusion and water formation  [Invited]
    30th COSPAR Scientific Assembly  2012/07  Mysore, India
  • Spin temperatures of hydrogen and water molecules on amorphous solid water  [Invited]
    ASTROCHEM 2012  2012/07  Kolkata, India
  • Grain surface processes at very low temperatures: hydrogen diffusion and tunneling reactions  [Invited]
    N. Watanabe
    Gordon Research Conference, Radiation Driven Processes in Physics, Chemistry, Biology, and Industry  2012/07  New Hampshire, USA
  • Hydrogen chemistry on cold grain surfaces  [Invited]
    XVIIIth Symposium on Atomic, Cluster, and Surface Physics  2012/01  Alpe d'Huez, France
  • Hydrogen tunneling reaction and its isotope effect at a low temperature ice surface: Origin of deuterium enrichments in interstellar formaldehyde and methanol  [Invited]
    N. Watanabe, H. Hidaka, A. Kouchi 9. N. Watanabe, H. Hidaka, A. Kouchi
    International Conference on the Research of Chemistry and Physics of Matrix Isolated Species(MATRIX2011)  2011/07  Vancouver, Canada
  • Ice surface chemistry of hydrogen atom in space  [Invited]
    N. Watanabe, H. Hidaka, T. Hama, A. Kouchi, T. Chigai, Y. Kimura
    27th European Conference on Surface Science, ECOSS 27  2010/08  Groningen, the Netherlands
  • Surface processes of atomic hydrogen at very low temperatures relevant to astrochemistry  [Invited]
    N. Watanabe
    24th International Conference on Atomic Collisions in Solids ICACS- 24  2010/07  Kraków, Poland
  • Chemistry of atomic hydrogen on interstellar ice grains at very low temperatures  [Invited]
    N. Watanabe, H. Hidaka, A. Kouchi, T. Hama, Y. Kimura
    Western Pacific Geophysics Meeting  2010/06  Taipei, Taiwan
  • Physicochemical processes of atomic hydrogen on amorphous solid water at very low temperatures  [Invited]
    N. Watanabe, A. Kouchi, H. Hidaka, Y. Kimura, T. Hama
    239th American Chemical Society National Meeting & Exposition  2010/03  San Francisco, USA
  • Ice surface reactions: its role in chemical evolution in space  [Invited]
    ILTS International Symposium "Frontier of Low Temperature Science", Sapporo  2009/11  Sapporo
  • Tunneling reactions of atomic hydrogen and molecules on amorphous solid water at very low temperatures  [Invited]
    N. Watanabe
    Horiba-ISSP International Symposium on “Hydrogen and water in condensed matter physics”  2009/10  Chiba
  • Reactions of hydrogen atoms and molecules on amorphous solid water at very low temperatures  [Invited]
    N. Watanabe
    Gordon Research Conferences, Physics & Chemistry of Matrix-Isolated Species  2009/07  Oxford, UK
  • Nonenergetic reactions between hydrogen and molecules On Interstellar Grain Surfaces  [Invited]
    N. Watanabe
    XXVI International Conference on Photonic, Electronic, and Atomic Collisions  2009/07  Michigan, USA
  • Experimental approach to grain surface reactions of hydrogen and deuterium atoms  [Invited]
    International Lorentz Center Workshop: Interstellar Surfaces: From Laboratory to Models  2008/10  Leiden, Holland
  • Grain surface chemistry: fractionation routes  [Invited]
    N. Watanabe
    The Molecular Univers: an International Meeting on Physics and Chemistry of the Intersteller Medium  2008/05  Arcachon, France
  • Simultaneous irradiation experiments of H2O-CO binary ice with UV photons and cold H atoms  [Invited]
    N. Watanabe, A. Nagaoka, O. MouriI, A. Kouchi and V. Pirronello
    Asia-Oceania Geosciences Society Annual Meeting  2007/08  Bangkok, Thailand
  • Laboratory study of chemical processes on interstellar ice grains  [Invited]
    N. Watanabe, A. Nagaoka, H. Hidaka, A. Kouchi
    XXIV International Union of Feodesy and Geophysics (IUGG) General Assembly  2007/07  Perguia, Italy
  • Reactions of hydrogen and deuterium atoms with CO, formaldehyde, and methanol on ice grains  [Invited]
    International Astrophysics and Astrochemistry Meeting: Molecules in Space & Laboratory  2007/05  Paris, France
  • Formation of simple organic molecules by Hydrogenation on grain surfaces  [Invited]
    N. Watanabe
    International Astronomical Union Symposium: Astrochemistry,  2005/08  California,USA
  • Formation of deuterated methanol by surface reactions at 10 K  [Invited]
    N. Watanabe, A. Nagaoka, A. Kouchi
    Asia-Oceania Geosciences Society Annual Meeting  2005/06  Singapore
  • Evolution of CO molecule on dusts in dense core: formation of H2CO and CH3OH  [Invited]
    N. Watanabe
    The 4th International Symposium on New Trends of Physics, Recent Advances in Astrophysics and Planetary Science -from the early universe to the Solar system-  2005/03  Sapporo


Research Grants & Projects

  • Atomic and Molecular Processes on Amorphous ice surface
  • Study on Atomic,ionic,and Molecular Photoionization processes

Educational Activities

Teaching Experience

  • Advanced Course in Planetary Material Science
    開講年度 : 2017
    課程区分 : 修士課程
    開講学部 : 理学院
    キーワード : アモルファス氷,結晶氷,星間塵,彗星,氷天体
  • Environment and People
    開講年度 : 2017
    課程区分 : 学士課程
    開講学部 : 全学教育
    キーワード : 地球環境、雪氷、大気、海洋、生態系、生物、光合成、耐寒性、宇宙の氷、分子進化

Campus Position History

  • 2018年4月1日 

Position History

  • 2018年4月1日 

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