Mechanisms of formation and isotope fractionation of interstellar molecules on cosmic dust

• Project/Area Number: 24224012
• Research Category: Grant-in-Aid for Scientific Research (S)
• Allocation Type: Single-year Grants
• Research Field: Geochemistry/Astrochemistry
• Research Institution: Hokkaido University
• Principal Investigator: WATANABE NAOKI 北海道大学, 低温科学研究所, 教授 (50271531)
• Co-Investigator(Kenkyū-buntansha): 日高 宏 北海道大学, 低温科学研究所, 助教 (00400010) ; 大場 康弘 北海道大学, 低温科学研究所, 助教 (00507535) ; 羽馬 哲也 北海道大学, 低温科学研究所, 助教 (20579172)
• Co-Investigator(Renkei-kenkyūsha): KOUCHI Akira 北海道大学, 低温科学研究所, 教授 (60161866)
• Project Period (FY): 2012-05-31 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥129,740,000 (Direct Cost: ¥99,800,000、Indirect Cost: ¥29,940,000); Fiscal Year 2016: ¥14,690,000 (Direct Cost: ¥11,300,000、Indirect Cost: ¥3,390,000); Fiscal Year 2015: ¥14,950,000 (Direct Cost: ¥11,500,000、Indirect Cost: ¥3,450,000); Fiscal Year 2014: ¥15,470,000 (Direct Cost: ¥11,900,000、Indirect Cost: ¥3,570,000); Fiscal Year 2013: ¥31,070,000 (Direct Cost: ¥23,900,000、Indirect Cost: ¥7,170,000); Fiscal Year 2012: ¥53,560,000 (Direct Cost: ¥41,200,000、Indirect Cost: ¥12,360,000)
• Keywords: 地球外物質化学 / 星間塵表面反応 / 重水素濃集 / 同位体分別 / 化学進化 / 地球外物質科学

Outline of Final Research Achievements

Formation and isotope fractionation of molecules in molecular clouds are very important as the initial stage of chemical evolution toward planetary system. The aim of this project was to clarify the role of physicochemical processes on cosmic ice dust at very low temperatures which are keys in chemical evolution. We have experimentally demonstrated mechanisms of elementary processes for molecular formation and deuteration on ice at around 10 K. We determined diffusion-rates of hydrogen (deuterium) atoms on amorphous ice and formation (and deuteration) pathways and those reaction rates for water and some primordial organic molecules.

Assessment Rating

Verification Result (Rating)

A

Research Products

• [Int'l Joint Research] シュツットガルト大(ドイツ)
• [Int'l Joint Research] カイロ大(エジプト)
• [Int'l Joint Research] シェルブルック大(カナダ)
• [Int'l Joint Research] CSIC(スペイン)
• [Int'l Joint Research] カターニャ大(イタリア)
• [Int'l Joint Research]
• [Journal Article] Simulations and Spectra of Water in CO Matrices (2017)
  • Author(s): R. Escribano, E. Artacho, A. Kouchi, T. Hama, Y. Kimura, H. Hidaka, and N Watanabe
  • Journal Title: Physical Chemistry Chemical Physics Volume: 19 Issue: 10 Pages: 7280-7287
  • DOI: 10.1039/c6cp08248c
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Hydrogenation and Deuteration of C2H2 and C2H4 on Cold Grains: Clue to the Formation Mechanism of C2H6 with Astronomical Interest (2017)
  • Author(s): H. Kobayashi, H. Hidaka, T. Lamberts, T. Hama, H. Kawakita, J. Kaestner, and N. Watanabe
  • Journal Title: The Astrophysical Journal Volume: 837 Issue: 2 Pages: 155-155
  • DOI: 10.3847/1538-4357/837/2/155
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Stepwise formation of H3O+(H2O)n in an ion drift tube: Empirical effective temperature of association/dissociation reaction equilibrium in an electric field (2017)
  • Author(s): Y. Nakai, H.Hidaka, N. Watanabe, T.M.Kojima
  • Journal Title: Journal of Chemical Physics Volume: 144 Issue: 22
  • DOI: 10.1063/1.4953416
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Two-step Process in Homogeneous Nucleation of Alumina in Supersaturated Vapo (2016)
  • Author(s): Shinnosuke Ishizuka, Yuki Kimura, Tomoya Yamazaki, Tetsuya Hama, Naoki Watanabe, Akira Kouchi
  • Journal Title: Chemistry of Materials Volume: 28 Issue: 23 Pages: 8732-8741
  • DOI: 10.1021/acs.chemmater.6b04061
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Negative catalytic effect of water on the reactivity of hydrogen abstraction from the C-H bond of dimethyl ether by deuterium atoms through tunnling at low temperatures (2016)
  • Author(s): Y. Oba, N. Watanabe, A. Kouchi
  • Journal Title: Chemical Physics Letters Volume: 662 Pages: 14-18
  • DOI: 10.1016/j.cplett.2016.07.058
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Hydrogen-deuterium substitution in solid ethanol by surface reactions at low temperatures (2016)
  • Author(s): Y. Oba, K. Osaka, T. Chigai, A. Kouchi, N. Watanabe
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 462 Issue: 1 Pages: 689-695
  • DOI: 10.1093/mnras/stw1714
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Deuterium fractionation during amino acid formation by photolysis of interstellar ice analogs containing deuterated methanol (2016)
  • Author(s): Y. Oba, Y. Takano, N. Watanabe, A. Kouchi
  • Journal Title: The Astrophysical Journal Letters Volume: 827 Issue: 1 Pages: L18-L18
  • DOI: 10.3847/2041-8205/827/1/l18
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] 宇宙の塵の化学：原子から分子・星・惑星系へ (2016)
  • Author(s): 羽馬哲也，香内晃，渡部直樹
  • Journal Title: CHEMISTRY & EDUCATION Volume: 64 Issue: 6 Pages: 282-283
  • DOI: 10.20665/kakyoshi.64.6_282
  • NAID: 130006788915
  • ISSN: 0386-2151, 2424-1830
  • Peer Reviewed
• [Journal Article] Hydrogenation and deuteration of solid benzene toward understanding chemical kinetics and isotopic fractionation on the surfaces of interstellar dust (2016)
  • Author(s): 羽馬哲也，植田寛和，渡部直樹，香内晃
  • Journal Title: Chikyukagaku Volume: 50 Issue: 2 Pages: 33-50
  • DOI: 10.14934/chikyukagaku.50.33
  • NAID: 130005158191
  • ISSN: 0386-4073, 2188-5923
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Matrix sublimation method for the formation of high-density amorphous ice (2016)
  • Author(s): A. Kouchi, T. Hama, Y. Kimura, H. Hidaka, R. Escribano, N. Watanabe
  • Journal Title: Chemical Physics Letters Volume: 658 Pages: 287-292
  • DOI: 10.1016/j.cplett.2016.06.066
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Surface Temperature Dependence of Hydrogen Ortho-Para Conversion on Amorphous Solid Water (2016)
  • Author(s): H. Ueta, N. Watanabe, T. Hama, and A. Kouchi
  • Journal Title: Physical Review Letters Volume: 116 Issue: 25
  • DOI: 10.1103/physrevlett.116.253201
  • NAID: 120005828466
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Statistical ortho-to-para ratio of water desorbed from ice at 10 kelvin (2016)
  • Author(s): T. Hama, A. Kouchi, N. Watanabe
  • Journal Title: Science Volume: 351 Issue: 6268 Pages: 65-67
  • DOI: 10.1126/science.aad4026
  • Peer Reviewed
• [Journal Article] Signatures of quantum-tunneling diffusion of hydrogen atoms on water ice at 10 K (2015)
  • Author(s): K.Kuwahata, T.Hama, A.Kouchi, N.Watanabe
  • Journal Title: Physical Review Letters Volume: 115 Issue: 13 Pages: 133201-133201
  • DOI: 10.1103/physrevlett.115.133201
  • Peer Reviewed
• [Journal Article] Chiral glycine formation on cold interstellar grains by quantum tunneling hydrogen-deuterium substitution reactions (2015)
  • Author(s): Y. Oba, N. Watanabe, Y. Osamura, A.Kouchi,
  • Journal Title: Chemical Physics Letters Volume: 634 Pages: 53-59
  • DOI: 10.1016/j.cplett.2015.05.070
  • Peer Reviewed
• [Journal Article] Quantum Tunneling Observed without Its Characteristic Large Kinetic Isotope Effects (2015)
  • Author(s): T. Hama, H. Ueta, A. Kouchi, N. Watanabe
  • Journal Title: Proceedings of the National Academy of Sciences of the United States of America Volume: 112 Issue: 24 Pages: 7438-7443
  • DOI: 10.1073/pnas.1501328112
  • Peer Reviewed
• [Journal Article] 低温アモルファス氷表面における水素原子の拡散―宇宙における分子進化の鍵― (2015)
  • Author(s): 羽馬哲也、香内晃、渡部直樹
  • Journal Title: 日本物理学会誌 Volume: 70 Pages: 608-613
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Quantum Tunneling Hydrogenation of Solid Benzene and Its Control via Surface Structure (2014)
  • Author(s): T. Hama, H. Ueta, A. Kouchi, N. Watanabe, H. Tachikawa
  • Journal Title: The Journal of Physical Chemistry Letters Volume: 5 Issue: 21 Pages: 3843-3848
  • DOI: 10.1021/jz5019948
  • Peer Reviewed
• [Journal Article] Reaction kinetics and isotope effect of water formation by the surface reaction of solid H2O2 with H atoms at low temperatures (2014)
  • Author(s): Y. Oba, K. Osaka, N. Watanabe, T. Chigai, A. Kouchi
  • Journal Title: Faraday Discussion Volume: 168 Pages: 185-204
  • DOI: 10.1039/c3fd00112a
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Hydrogen isotopic substitution of solid methylamine through atomic surface reactions at low temperatures: A potential contribution to the D/H ratio of methylamine in molecular clouds (2014)
  • Author(s): Y. Oba, T. Chigai, Y. Osamura, N. Watanabe, A. Kouchi
  • Journal Title: Meteoritics & Planetary Science Volume: 49 Issue: 1 Pages: 117-132
  • DOI: 10.1111/maps.12096
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Surface Processes on Interstellar Amorphous Solid Water:Adsorption, Diffusion, Tunneling, Reaction, and Nuclear-Spin Conversion (2013)
  • Author(s): T.Hama, N.Watanabe
  • Journal Title: Chemical Reviews Volume: 113 Issue: 12 Pages: 8783-8839
  • DOI: 10.1021/cr4000978
  • Peer Reviewed
• [Journal Article] Nuclear spin temperatures of hydrogen and water molecules on amorphous solid water (2013)
  • Author(s): N. Watanabe, T. Hama, A. Kouchi
  • Journal Title: AIP Conference Proceedings Volume: 1543 Pages: 308-316
  • DOI: 10.1063/1.4812625
  • Peer Reviewed
• [Journal Article] Photochemical reaction processes during vacuum-ultraviolet irradiation of water ice (2013)
  • Author(s): Yabushita, et al., (他2名、1番目)
  • Journal Title: Journal of Photochemistry and Photobiology C: Photochemistry Reviews Volume: 印刷中 Pages: 46-61
  • DOI: 10.1016/j.jphotochemrev.2013.01.001
  • Peer Reviewed
• [Journal Article] The Mechanism of surface diffusion of H and D atoms on amorphous solid water: Existence of various potential sites (2012)
  • Author(s): T. Hama
  • Journal Title: Astrophys. J. Volume: 757 Issue: 2 Pages: 12-12
  • DOI: 10.1088/0004-637x/757/2/185
  • Peer Reviewed
• [Journal Article] Water Formation Through a Quantum Tunneling Surface Reaction, OH+H_2 at 10 K (2012)
  • Author(s): Y.Oba, et al
  • Journal Title: The Astrophysical Journal Volume: 749 Issue: 1 Pages: 12-12
  • DOI: 10.1088/0004-637x/749/1/67
  • Peer Reviewed
• [Journal Article] 星間分子雲での微粒子表面における水素の化学物理過程 (2012)
  • Author(s): 渡部 直樹，香内 晃，羽馬 哲也，日高 宏，大場 康弘, 千貝 健
  • Journal Title: 表面科学 Volume: 33 Pages: 662-668
  • NAID: 10031136972
  • Peer Reviewed
• [Presentation] 低温環境下における薄膜状C60への水素原子の付加反応 (2017)
  • Author(s): 中井陽一, 渡部直樹, 大場康弘
  • Organizer: 日本物理学会第72回年次大会
  • Place of Presentation: 大阪大学 豊中キャンパス，大阪府，大阪市
  • Year and Date: 2017-03-17
• [Presentation] 素過程から迫る星間塵表面における分子進化：実験的アプローチ (2017)
  • Author(s): 渡部直樹
  • Organizer: シンポジウム「ダスト形成から惑星の多様性へ：宇宙の物質進化における物理と化学のカップリング
  • Place of Presentation: 東京大学小柴ホール，東京都文京区
  • Year and Date: 2017-03-06
  • Invited
• [Presentation] Hydrogen Physicochemical Processes on Ice Surface at around 10 K: Diffusion, Recombination and Nuclear Spin Conversion (2017)
  • Author(s): Naoki Watanabe
  • Organizer: 34th Symposium on Plasma Processing(SPP34), The 29th Symposium on Plasma Science for Materials(SPSM29)
  • Place of Presentation: 北海道大学学術交流会館，北海道，札幌市
  • Year and Date: 2017-01-16
  • Invited
• [Presentation] Strong temperature dependence of ortho-to-para conversion of H2 on amorphous solid water at around 10 K (2016)
  • Author(s): N.Watanabe
  • Organizer: EUROPEAN CONFERNCE ON LABORATORY ASTROPHYSICS (ECLA2016)GAS ON THE ROCKS
  • Place of Presentation: CSIC, Madrid, Spain
  • Year and Date: 2016-11-21
  • Int'l Joint Research
• [Presentation] Formation of high-density amorphous ice by matrix sublimation method (2016)
  • Author(s): 22.A. Kouchi, T. Hama,Y. Kimura, H. Hidaka,R. Escribano, and N. Watanabe
  • Organizer: Workshop on Interstellar Matter 2016
  • Place of Presentation: 北海道大学，北海道，札幌市
  • Year and Date: 2016-10-19
  • Int'l Joint Research
• [Presentation] Measurements of surface profile of amorphous solid water by a non-contact atomic force microscope (2016)
  • Author(s): H. Hidaka, Y. Sugimoto, A. Kouchi , and N. Watanabe
  • Organizer: Workshop on Interstellar Matter 2016
  • Place of Presentation: 北海道大学，北海道，札幌市
  • Year and Date: 2016-10-19
  • Int'l Joint Research
• [Presentation] egative catalytic effect of amorphous solid water on the hydrogen abstraction from dimethyl ether with deuterium atoms at low temperatures (2016)
  • Author(s): Y. Oba, N. Watanabe, and A. Kouchi
  • Organizer: Workshop on Interstellar Matter 2016
  • Place of Presentation: 北海道大学，北海道，札幌市
  • Year and Date: 2016-10-19
  • Int'l Joint Research
• [Presentation] Experiments on hydrogenation and deuteration of C2H2 and C2H4 on low temperature surfaces : formation mechanism of C2H6 with astronomical interest (2016)
  • Author(s): H. Kobayashi, H. Hidaka,3T. Hama,3H. Kawakita, and N. Watanabe
  • Organizer: Workshop on Interstellar Matter 2016
  • Place of Presentation: 北海道大学，北海道，札幌市
  • Year and Date: 2016-10-19
  • Int'l Joint Research
• [Presentation] Nuclear spin isomers of photodesorbed water from ice at 10 K (2016)
  • Author(s): T. Hama, A. Kouchi, and N. Watanabe
  • Organizer: Workshop on Interstellar Matter 2016
  • Place of Presentation: 北海道大学，北海道，札幌市
  • Year and Date: 2016-10-19
  • Int'l Joint Research
• [Presentation] Temperature dependence of ortho-to-para conversion of H2 on amorphous solid water at around 10 K (2016)
  • Author(s): H. Ueta, N. Watanabe, T. Hama, A. Kouchi
  • Organizer: Workshop on Interstellar Matter 2016
  • Place of Presentation: 北海道大学，北海道，札幌市
  • Year and Date: 2016-10-19
  • Int'l Joint Research
• [Presentation] 疑似星間塵氷の光化学反応で生成するアミノ酸の重水素置換体存在度 (2016)
  • Author(s): 大場 康弘、高野 淑識、渡部 直樹、香内 晃
  • Organizer: 日本地球化学会第63回年会
  • Place of Presentation: 北海道大学，北海道，札幌市
  • Year and Date: 2016-09-14
• [Presentation] Tunneling hydrogenation of acetylene and ethylene on amorphous solid water at very low temperatures (2016)
  • Author(s): Hitomi Kobayashi, Hideyo Kawakita, Hiroshi Hidaka, Tetsuya Hama, Naoki Watanabe
  • Organizer: 第32回化学反応討論会
  • Place of Presentation: 大宮ソニックシティー，埼玉県，さいたま市
  • Year and Date: 2016-06-01
• [Presentation] Reaction equilibrium for stepwise attachment/detachment of a water molecule to/from H3O+(H2O)n in electric field of an ion drift tube (2016)
  • Author(s): Yoichi Nakai, Hiroshi Hidaka, Naoki Watanabe, Takao M Kojima
  • Organizer: 第32回化学反応討論会
  • Place of Presentation: 大宮ソニックシティー，埼玉県，さいたま市
  • Year and Date: 2016-06-01
• [Presentation] Quantum-tunneling hydrogen abstraction from dimethyl ether-water complex solid at low temperatures: On the effect of complex formation (2016)
  • Author(s): Y. Oba, N. Watanabe, A. Kouchi
  • Organizer: 第32回化学反応討論会
  • Place of Presentation: 大宮ソニックシティー，埼玉県，さいたま市
  • Year and Date: 2016-06-01
• [Presentation] 鉄基板上でのFT型触媒反応実験における反応効率の温度依存性 (2016)
  • Author(s): 木村 勇気、佐藤 理佳子、山 明、永原 裕子、羽馬 哲也、日高 宏、渡部 直樹、香内 晃
  • Organizer: 日本地球惑星科学連合2016年大会
  • Place of Presentation: 幕張メッセ，千葉県，千葉市
  • Year and Date: 2016-05-22
• [Presentation] 芳香族炭化水素薄膜の水素化における強い表面構造依存性 (2016)
  • Author(s): 羽馬哲也
  • Organizer: 日本物理学会第71回年次大会
  • Place of Presentation: 東北学院大学 泉キャンパス (宮城県 仙台市）
  • Year and Date: 2016-03-19
  • Invited
• [Presentation] アモルファス氷表面における水素分子核スピン転換の表面温度依存性 (2016)
  • Author(s): 植田寛和，渡部直樹，羽馬哲也，香内晃
  • Organizer: 日本物理学会第71回年次大会
  • Place of Presentation: 東北学院大学 泉キャンパス (宮城県 仙台市）
  • Year and Date: 2016-03-19
• [Presentation] Experimental approach to ortho-to-para ratio of hydrogen and water molecules desorbed from ice at around 10 K (2016)
  • Author(s): Naoki Watanabe
  • Organizer: Workshop on Astrochemistry in Star and Planet Formation
  • Place of Presentation: 理化学研究所(埼玉県和光市）
  • Year and Date: 2016-02-16
  • Int'l Joint Research / Invited
• [Presentation] 反射吸収赤外分光法で探る宇宙の塵の表面化学 (2016)
  • Author(s): 羽馬 哲也
  • Organizer: 日本分光学会北海道支部シンポジウム
  • Place of Presentation: 北海道大学(北海道札幌市）
  • Year and Date: 2016-01-27
• [Presentation] Low-temperature hydrogenation and deuteration of solid aromatic hydrocarbon by tunneling (2015)
  • Author(s): T. Hama
  • Organizer: From clouds to protoplanetary disk: the astrochemical link
  • Place of Presentation: Hans Harnack Haus, Berlin, Germany
  • Year and Date: 2015-10-05
  • Int'l Joint Research
• [Presentation] Deuterium chemistry and nuclear spin conversion on grain surfaces: implication to deuterium enrichment (2015)
  • Author(s): N.Watanabe
  • Organizer: From clouds to protoplanetary disk: the astrochemical link
  • Place of Presentation: Hans Harnack Haus, Berlin, Germany
  • Year and Date: 2015-10-05
  • Int'l Joint Research / Invited
• [Presentation] Deuteration of interstellar glycine on low-temperature surfaces: A possible route to the formation of chiral molecules in dense molecular clouds (2015)
  • Author(s): Y. Oba
  • Organizer: From clouds to protoplanetary disk: the astrochemical link
  • Place of Presentation: Hans Harnack Haus, Berlin, Germany
  • Year and Date: 2015-10-05
  • Int'l Joint Research
• [Presentation] 量子トンネル反応による極低温表面でのキラルグリシン生成 (2015)
  • Author(s): 大場康弘
  • Organizer: 原子衝突学会第４０回年会
  • Place of Presentation: 首都大学東京 南大沢キャンパス(東京都八王子市）
  • Year and Date: 2015-09-28
• [Presentation] Tunneling hydrogenation and deuteration of solid benzene without large kinetic isotope effects (2015)
  • Author(s): T. Hama, H. Ueta, A. Kouchi, N. Watanabe
  • Organizer: A symposium to honor Lou Allamandola’s Contributions to the Molecular Universe
  • Place of Presentation: Annapolis, MD, USA
  • Year and Date: 2015-09-13
  • Int'l Joint Research
• [Presentation] Grain Surface Chemistry: What Happens Without Photons and Ions (2015)
  • Author(s): N. Watanabe
  • Organizer: A symposium to honor Lou Allamandola’s Contributions to the Molecular Universe
  • Place of Presentation: Annapolis, MD, USA
  • Year and Date: 2015-09-13
  • Int'l Joint Research / Invited
• [Presentation] Formation of deuterated “chiral” glycine by low-temperature surface reactions via quantum tunneling (2015)
  • Author(s): Y. Oba, N. Watanabe, A. Kouchi
  • Organizer: Goldschmidt2015
  • Place of Presentation: Prague Congress Center, Czeck Republic
  • Year and Date: 2015-08-16
  • Int'l Joint Research
• [Presentation] H and He Ion Irradiation Experiments of Corundum: Amorphization of interstellar dust (2015)
  • Author(s): A. Takigawa, T. Matsumoto, N. Watanabe, A. Miyake , K. Yasuda, Y. Nakata , A. Tsuchiyama
  • Organizer: Goldschmidt2015
  • Place of Presentation: Prague Congress Center, Czeck Republic
  • Year and Date: 2015-08-16
  • Int'l Joint Research
• [Presentation] 極低温氷表面上での水素分子のオルソ・パラ転換における温度依存性 (2015)
  • Author(s): 植田寛和, 羽馬哲也, 香内晃, 渡部直樹
  • Organizer: 機能物性融合科学研究会シリーズ(3)「反応と輸送」
  • Place of Presentation: 東京大学物性研究所(千葉県柏市）
  • Year and Date: 2015-06-24
• [Presentation] Role of tunneling in the formation and deuterium enrichment of molecules on dust grains (2015)
  • Author(s): N. Watanabe, Y. Oba, T. Hama, H. Hidaka and A. Kouchi
  • Organizer: Astrobiology Science Conference 2015
  • Place of Presentation: Hilton Chicago, Illinois, USA
  • Year and Date: 2015-06-15
  • Int'l Joint Research / Invited
• [Presentation] Mechanism for the prebiotic emergence of ‘”chirality”: Chiral glycine formation on interstellar grains (2015)
  • Author(s): Y. Oba, N. Watanabe, and A. Kouchi
  • Organizer: Astrobiology Science Conference 2015
  • Place of Presentation: Hilton Chicago, Illinois, USA
  • Year and Date: 2015-06-15
  • Int'l Joint Research
• [Presentation] Tunneling Observed without Characteristic Kinetic Isotope Effects in Hydrogenation/deuteration of Solid Benzene (2015)
  • Author(s): T. Hama, H. Ueta, A. Kouchi, N. Watanabe
  • Organizer: 31st Symposium on Chemical Kinetics and Dynamics
  • Place of Presentation: Hokkaido Univ (北海道札幌市）
  • Year and Date: 2015-06-03
  • Int'l Joint Research
• [Presentation] Hydrogen-deuterium substitution of glycine via quantum-tunneling surface reactions at low temperatures (2015)
  • Author(s): Y. Oba, N. Watanabe, A. Kouchi
  • Organizer: 31st Symposium on Chemical Kinetics and Dynamics
  • Place of Presentation: Hokkaido Univ (北海道札幌市）
  • Year and Date: 2015-06-03
  • Int'l Joint Research
• [Presentation] Tunneling hydrogenation of acetylene and ethylene on amorphous solid water at very low temperatures (2015)
  • Author(s): H. Kobayashi, H. Kawakita, H. Hidaka, T. Hama, N. Watanabe
  • Organizer: 31st Symposium on Chemical Kinetics and Dynamics
  • Place of Presentation: Hokkaido Univ (北海道札幌市）
  • Year and Date: 2015-06-03
  • Int'l Joint Research
• [Presentation] Reaction equilibrium for stepwise attachment/detachment of a water molecule to/from H3O+(H2O)n in electric field of an ion drift tube (2015)
  • Author(s): Y. Nakai, H. Hiroshi, N. Watanabe, T. M. Kojima
  • Organizer: 31st Symposium on Chemical Kinetics and Dynamics
  • Place of Presentation: Hokkaido Univ (北海道札幌市）
  • Year and Date: 2015-06-03
  • Int'l Joint Research
• [Presentation] Separation of H3O+ hydrates which have different formation origins by drift time measurements (2015)
  • Author(s): H. Hidaka, Y. Nakai, T. M. Kojima, N. Watanabe
  • Organizer: 31st Symposium on Chemical Kinetics and Dynamics
  • Place of Presentation: Hokkaido Univ (北海道札幌市）
  • Year and Date: 2015-06-03
  • Int'l Joint Research
• [Presentation] Surface processes on interstellar dust: thermal diffusion and tunneling reaction (2015)
  • Author(s): T. Hama, A. Kouchi and N. Watanabe
  • Organizer: Annual meeting / international symposium of Spectroscopical Society of Japan 2015
  • Place of Presentation: Tokyo Institute of Technology Ookayama campus (東京都目黒区）
  • Year and Date: 2015-06-01
  • Int'l Joint Research / Invited
• [Presentation] Experimental Approach to Chemistry of Cosmic Dust (2015)
  • Author(s): N. Watanabe
  • Organizer: COST Action Our Astrochemical History
  • Place of Presentation: J. Heyrovský Institute of Physical Chemistry, Czeck Republic
  • Year and Date: 2015-05-25
  • Int'l Joint Research / Invited
• [Presentation] Glycine Becomes Chiral by Grain-Surface Reactions at Low Temperatures (2015)
  • Author(s): Y. Oba
  • Organizer: COST Action Our Astrochemical History
  • Place of Presentation: J. Heyrovský Institute of Physical Chemistry, Czeck Republic
  • Year and Date: 2015-05-25
  • Int'l Joint Research
• [Presentation] 初期太陽系星雲中でのFT型触媒反応による分子形成の再現実験 (2015)
  • Author(s): 木村 勇気, 山﨑 智也, 土山 明, 永原 裕子, 羽馬 哲也, 日高 宏, 渡部 直樹, 香内 晃
  • Organizer: 日本地球惑星科学連合2015年大会
  • Place of Presentation: 幕張メッセ 国際会議場 (千葉県千葉市）
  • Year and Date: 2015-05-24
• [Presentation] 表面構造により制御される固体ベンゼンの水素原子トンネル付加反応 (2015)
  • Author(s): 羽馬哲也, 植田 寛和, 香内 晃, 渡部 直樹, 田地川 浩人
  • Organizer: 日本地球惑星科学連合2015年大会
  • Place of Presentation: 幕張メッセ 国際会議場 (千葉県千葉市）
  • Year and Date: 2015-05-24
• [Presentation] イオン誘起微粒子核生成 III: 反応速度論的アプローチ (2015)
  • Author(s): 渡部 直樹, 中井 陽一, 羽馬 哲也, 日高 宏
  • Organizer: 日本地球惑星科学連合2015年大会
  • Place of Presentation: 幕張メッセ 国際会議場 (千葉県千葉市）
  • Year and Date: 2015-05-24
• [Presentation] Experimental approach to nonenergetic physicochemical processes on icy grains (2015)
  • Author(s): N. Watanabe
  • Organizer: Icy Grain Chemistry for Formation of Complex Organic Molecules: From Molecular Clouds to Protoplanetary Disks, Comets and Meteorites
  • Place of Presentation: Tokyo Institute of Technology, Tokyo, Japan
  • Year and Date: 2015-03-05 – 2015-03-07
  • Invited
• [Presentation] What Controls the Diffusion Mechanism of Hydrogen Atom on Ice? (2015)
  • Author(s): N. Watanabe, T. Hama, K. Kuwahata, A. Kouchi
  • Organizer: Second Workshop on Experimental Laboratory Astrophysics
  • Place of Presentation: Poipu, Kauai, Hawaii
  • Year and Date: 2015-02-23 – 2015-02-26
  • Invited
• [Presentation] Molecular Formation Experiment by Catalytic Reaction on Inorganic Surfaces at Low Pressure Environment (2015)
  • Author(s): Y. Kimura, N. Watanabe, A. Tsuchiyama, H. Nagahara, A. Kouchi
  • Organizer: Second Workshop on Experimental Laboratory Astrophysics
  • Place of Presentation: Poipu, Kauai, Hawaii
  • Year and Date: 2015-02-23 – 2015-02-26
• [Presentation] Controlling Hydrogenation of Solid Benzene by Quantum Tunneling via Surface Structure (2015)
  • Author(s): T. Hama, H. Ueta, A. Kouchi, N. Watanabe, and H. Tachikawa
  • Organizer: Second Workshop on Experimental Laboratory Astrophysics
  • Place of Presentation: Poipu, Kauai, Hawaii
  • Year and Date: 2015-02-23 – 2015-02-26
• [Presentation] Water Formation by Reaction of Solid Hydrogen Peroxide with Hydrogen Atoms at Low Temperatures via Quantum Tunneling (2015)
  • Author(s): K. Osaka , Y. Oba , A. Kouchi , N. Watanabe
  • Organizer: Second Workshop on Experimental Laboratory Astrophysics
  • Place of Presentation: Poipu, Kauai, Hawaii
  • Year and Date: 2015-02-23 – 2015-02-26
• [Presentation] In-situ observation of ices by ultrahigh vacuum transmission electron microscope and atomic force microscope (2014)
  • Author(s): A. Kouchi, H. Hidaka, Y. Kimura, T. Hama, and N. Watanabe
  • Organizer: Workshop on Interstellar Matter 2014
  • Place of Presentation: Hokkaido University, Sapporo
  • Year and Date: 2014-10-16 – 2014-10-18
  • Invited
• [Presentation] Experiments for ionic cluster formation using an ion drift-tube with selected-ion injection (2014)
  • Author(s): Y. Nakai, H. Hidaka, N. Watanabe and T. M. Kojima
  • Organizer: Workshop on Interstellar Matter 2014
  • Place of Presentation: Hokkaido University, Sapporo
  • Year and Date: 2014-10-16 – 2014-10-18
• [Presentation] Formation of H3O+ hydrate by NO+ injection into drift tube filled with H2O/buffer gases: separation between the contributions of two formation pathways by the drift time measurements (2014)
  • Author(s): H. Hidaka, Y. Nakai, T. M. Kojima, and N. Watanabe
  • Organizer: Workshop on Interstellar Matter 2014
  • Place of Presentation: Hokkaido University, Sapporo
  • Year and Date: 2014-10-16 – 2014-10-18
• [Presentation] Reproductive experiment of organic formation by catalytic reactions in the solar nebula (2014)
  • Author(s): Y. Kimura, N. Watanabe, A. Tsuchiyama, H. Nagahara, and A. Kouchi
  • Organizer: Workshop on Interstellar Matter 2014
  • Place of Presentation: Hokkaido University, Sapporo
  • Year and Date: 2014-10-16 – 2014-10-18
• [Presentation] Hydrogen atom addition reactions to solid benzene by quantum tunneling and its strong structure dependence (2014)
  • Author(s): T. Hama, H. Ueta, A. Kouchi, N. Watanabe, and H Tachikawa
  • Organizer: Workshop on Interstellar Matter 2014
  • Place of Presentation: Hokkaido University, Sapporo
  • Year and Date: 2014-10-16 – 2014-10-18
• [Presentation] H-D Substitution Reactions of Solid Ethanol with Atomic Deuterium via Quantum Tunneling at Low Temperatures (2014)
  • Author(s): K. Osaka, Y. Oba, A. Kouchi, and N. Watanabe
  • Organizer: Workshop on Interstellar Matter 2014
  • Place of Presentation: Hokkaido University, Sapporo
  • Year and Date: 2014-10-16 – 2014-10-18
• [Presentation] Hydrogen addition reactions of simple aliphatic hydrocarbons (C2H2 and C2H4) ~ clue to the formation mechanism of cometary C2H6~ (2014)
  • Author(s): H. Kobayashi, N. Watanabe, H. Hidaka, T. Hama, Y. Watanabe, and H. Kawakita
  • Organizer: Workshop on Interstellar Matter 2014
  • Place of Presentation: Hokkaido University, Sapporo
  • Year and Date: 2014-10-16 – 2014-10-18
• [Presentation] マトリックス昇華法による真空中での高圧氷の作製 (2014)
  • Author(s): 香内 晃, 羽馬 哲也, 木村 勇気, 日高 宏, 渡部 直樹
  • Organizer: 日本鉱物科学会
  • Place of Presentation: 熊本大学、熊本市
  • Year and Date: 2014-09-17 – 2014-09-19
• [Presentation] 星間塵表面反応で生成する水の水素同位体組成 (2014)
  • Author(s): 大場 康弘, 渡部 直樹, 香内 晃
  • Organizer: 日本地球化学会年会
  • Place of Presentation: 富山大学，富山市
  • Year and Date: 2014-09-16 – 2014-09-18
• [Presentation] ダスト表面における水素分子形成過程：実験からのアプローチ (2014)
  • Author(s): 渡部直樹
  • Organizer: 日本天文学会
  • Place of Presentation: 山形大学, 山形市
  • Year and Date: 2014-09-11 – 2014-09-13
  • Invited
• [Presentation] Nuclear spin temperatures of hydrogen and water molecules formed and trapped on ice (2014)
  • Author(s): N. Watanabe
  • Organizer: Nuclear Spin Effects in Astrochemistry
  • Place of Presentation: Chalmers University of Technology, Gothenburg, Sweden
  • Year and Date: 2014-06-09 – 2014-06-11
  • Invited
• [Presentation] 宇宙における分子進化と低温星間塵表面での原子分子過程 (2014)
  • Author(s): 渡部直樹
  • Organizer: 原子・分子・光科学（AMO）討論会
  • Place of Presentation: 大阪大学，大阪市
  • Year and Date: 2014-06-06 – 2014-06-07
  • Invited
• [Presentation] Water formation in space: quantum-tunneling surface reaction H2O2 + H at low temperatures (2014)
  • Author(s): Y. Oba, N. Watanabe, A. Kouchi
  • Organizer: 第30回化学反応討論会
  • Place of Presentation: イーグレ姫路，姫路市
  • Year and Date: 2014-06-04 – 2014-06-06
• [Presentation] Dramatic change in hydrogenation efficiency of solid benzene at low temperature between the crystalline and amorphous surfaces (2014)
  • Author(s): T. Hama, H. Ueta, A. Kouchi, N. Watanabe
  • Organizer: 第30回化学反応討論会
  • Place of Presentation: イーグレ姫路，姫路市
  • Year and Date: 2014-06-04 – 2014-06-06
• [Presentation] 極低温原子間力顕微鏡によるアモルファス氷の表面構造観察 (2014)
  • Author(s): 日髙 宏, 杉本 宜昭, 中坪 俊一, 渡部 直樹, 香内 晃
  • Organizer: 日本地球惑星科学連合
  • Place of Presentation: パシフィコ横浜，横浜市
  • Year and Date: 2014-04-28 – 2014-05-02
  • Invited
• [Presentation] イオン誘起微粒子核生成I：装置開発とねらい (2014)
  • Author(s): 渡部 直樹, 日髙 宏, 中井 陽一, 小島 隆夫
  • Organizer: 日本地球惑星科学連合
  • Place of Presentation: パシフィコ横浜，横浜市
  • Year and Date: 2014-04-28 – 2014-05-02
• [Presentation] 固体表面におけるC2H2 分子水素付加反応：彗星C2H6 生成の解明に向けて (2014)
  • Author(s): 小林 仁美, 渡部 直樹, 日髙 宏, 羽馬 哲也, 渡邊 陽司, 河北 秀世
  • Organizer: 日本地球惑星科学連合
  • Place of Presentation: パシフィコ横浜，横浜市
  • Year and Date: 2014-04-28 – 2014-05-02
• [Presentation] イオン誘起微粒子生成Ⅱ：水クラスターイオンの自由エネルギー (2014)
  • Author(s): 日髙 宏, 中井 陽一, 小島 隆夫, 渡部 直樹
  • Organizer: 日本地球惑星科学連合
  • Place of Presentation: パシフィコ横浜，横浜市
  • Year and Date: 2014-04-28 – 2014-05-02
• [Presentation] Reaction kinetics and isotope effect of water formation by the surface reaction of solid H2O2 with H atoms at low temperatures (2014)
  • Author(s): Y. Oba, K. Osaka, N. Watanabe, T. Chigai, A. Kouchi
  • Organizer: Faraday Discussion 168 Astrochemistry of Dust, Ice and Gas
  • Place of Presentation: NH Conference Centre, Leiden, The Netherlands
  • Year and Date: 2014-04-07 – 2014-04-09
• [Presentation] Cyclohexane formation following Hydrogenation of amorphous solid benzene at 20 K (2014)
  • Author(s): T. Hama, H. Ueta, A. Kouchi, N. Watanabe
  • Organizer: Faraday Discussion 168 Astrochemistry of Dust, Ice and Gas
  • Place of Presentation: NH Conference Centre, Leiden, The Netherlands
  • Year and Date: 2014-04-07 – 2014-04-09
• [Presentation] Hydrogen addition reactions of C2H2 on cold grains; clue to the formation mechanism of cometary C2H6 (2014)
  • Author(s): H. Kobayashi, N. Watanabe, H. Hidaka, T. Hama, Y. Watanabe, H. Kawakita
  • Organizer: Faraday Discussion 168 Astrochemistry of Dust, Ice and Gas
  • Place of Presentation: NH Conference Centre, Leiden, The Netherlands
  • Year and Date: 2014-04-07 – 2014-04-09
• [Presentation] 極低温固体エタノールの水素－重水素トンネル置換反応 (2014)
  • Author(s): 尾坂和哉，大場康弘，香内晃，渡部直樹
  • Organizer: 日本物理学会
  • Place of Presentation: 東海大学湘南キャンパス，平塚市
• [Presentation] イオン打ち込み型移動管を用いた水和クラスターイオンの生成実験の現状4 (2014)
  • Author(s): 中井陽一，日高宏，渡部直樹，小島隆夫
  • Organizer: 日本物理学会
  • Place of Presentation: 東海大学湘南キャンパス，平塚市
• [Presentation] Development of an ultrahigh vacuum transmission electron mircoscope for in-situ observation of ice (2014)
  • Author(s): A.Kouchi, N.Watanabe, H. Hidaka, T.Hama, S. Nakatsubo, K. Fujita, K. Sinbori, M. Ikeda
  • Organizer: 13th International Conference on the Physics and Chemistry of Ice(PCI-2014)
  • Place of Presentation: Dartmauth University, USA
• [Presentation] Role of quantum tunneling for the formation of H2O by reaction of H2 with OH on interstellar grains (2014)
  • Author(s): Yasuhiro Oba, Naoki Watanabe, Tetsuya Hama, Kazuaki Kuwahata, Hiroshi Hidaka, Akira Kouchi
  • Organizer: 247th ACS Chemistry & Materials for Energy
  • Place of Presentation: Dallas Convention Cente, USA
• [Presentation] Diffusion of hydrogen atom on ice: Thermal or tunneling? (2014)
  • Author(s): Naoki Watanabe, Kazuaki Kuwahata, Tetsuya Hama, Akira Kouchi.
  • Organizer: 247th ACS Chemistry & Materials for Energy
  • Place of Presentation: Dallas Convention Center, USA
  • Invited
• [Presentation] 低温氷星間塵表面における水素の化学 (2014)
  • Author(s): 渡部直樹
  • Organizer: 自然科学研究機構「自然科学における階層と全体」シンポジウム
  • Place of Presentation: 桑山ビル8階会議場，名古屋
  • Invited
• [Presentation] 星間塵表面反応による分子進化 (2013)
  • Author(s): 日高 宏
  • Organizer: ｢宇宙における分子進化：星間雲から原始惑星系へ」平成25年度研究集会
  • Place of Presentation: 北海道大学，札幌
• [Presentation] 分子雲有機物の生成・分析にむけた光化学反応実験装置の開発 (2013)
  • Author(s): 羽馬 哲也
  • Organizer: ｢宇宙における分子進化：星間雲から原始惑星系へ」平成25年度研究集会
  • Place of Presentation: 北海道大学，札幌
• [Presentation] 固体ベンゼンの水素原子トンネル付加反応によるシクロヘキサン生成 (2013)
  • Author(s): 羽馬哲也, 植田寛和, 渡部直樹, 香内晃
  • Organizer: 第３８回原子衝突学会年会
  • Place of Presentation: 理化学研究所，和光市
• [Presentation] 氷表面における水素原子の熱拡散およびトンネル拡散の実験研究 (2013)
  • Author(s): 桑畑和明, 羽馬哲也, 日高宏, 香内晃, 渡部直樹
  • Organizer: 第３８回原子衝突学会年会
  • Place of Presentation: 理化学研究所，和光市
• [Presentation] 極低温表面反応によるエタノールの水素-重水素交換 (2013)
  • Author(s): 尾坂和哉, 大場康弘, 香内晃, 渡部直樹
  • Organizer: 第３８回原子衝突学会年会
  • Place of Presentation: 理化学研究所，和光市
• [Presentation] 極低温原子表面反応によるエタノールの水素-重水素交換反応 (2013)
  • Author(s): 尾坂和哉, 大場康弘, 香内晃, 渡部直樹
  • Organizer: 第34回原子衝突若手の会
  • Place of Presentation: 熱海姫の沢自然の家，熱海市
• [Presentation] 低温アモルファス氷上での水素原子表面拡散の同位体効果 (2013)
  • Author(s): 桑畑和明，羽馬哲也，日高宏，香内晃，渡部直樹
  • Organizer: 日本物理学会
  • Place of Presentation: 徳島大学常三島キャンパス，徳島市
• [Presentation] イオン打ち込み型移動管を用いた水和クラスターイオンの生成実験の現状 (2013)
  • Author(s): 中井陽一，日高宏，渡部直樹，小島隆夫
  • Organizer: 日本物理学会
  • Place of Presentation: 徳島大学常三島キャンパス，徳島市
• [Presentation] Isotope Effect in the Formation of Solid Water by Surface Reactions at 10 K (2013)
  • Author(s): Y. Oba, N. Watanabe, A Kouchi
  • Organizer: Goldschmidt2013
  • Place of Presentation: Firenze Fiera Congress and Exhibition Centre, Italy
• [Presentation] Ion Irradiation Experiments to Olivine: Comparison with Space Weathering Rims of Itokawa and Lunar Regolith Particles (2013)
  • Author(s): 23. T. Matsumoto, A. Tsuchiyama, A. Takigawa, K. Yasuda, Y. Nakata, N. Watanabe, A .Kouchi, M. Nakamura, A. Miyake, M. Ohtake
  • Organizer: Goldschmidt2013
  • Place of Presentation: Firenze Fiera Congress and Exhibition Centre, Italy
• [Presentation] The Ortho-Para Ratio of H2O Desorbed from Ice: Implications for Cometary Coma (2013)
  • Author(s): T. Hama, A. Kouchi, N. Watanabe
  • Organizer: Goldschmidt2013
  • Place of Presentation: Firenze Fiera Congress and Exhibition Centre, Italy
  • Invited
• [Presentation] Isotope effect on hydrogen abstraction and addition reactions of the solid formaldehyde at low temperatures (2013)
  • Author(s): H. Hidaka, A. Kouchi, N. Watanabe
  • Organizer: 29th Symposium on Chemical Kinetics and Dynamics
  • Place of Presentation: Katahira Sakura Hall, Tohoku Univ., Sendai
• [Presentation] Surface number density of physisorbed H and D atoms on water ice during continuous atomic deposition (2013)
  • Author(s): K. Kuwahata, T. Hama, A. Kouchi, N. Watanabe
  • Organizer: 29th Symposium on Chemical Kinetics and Dynamics
  • Place of Presentation: Katahira Sakura Hall, Tohoku Univ, Sendai
• [Presentation] Experimental study of quantum-tunneling surface reaction OH + H2 → H2O+ H at 10 K (2013)
  • Author(s): Y. Oba, N. Watanabe, T. Hama, H. Hidaka., K. Kuwahata, A. Kouchi
  • Organizer: 29th Symposium on Chemical Kinetics and Dynamics
  • Place of Presentation: Katahira Sakura Hall, Tohoku Univ, Sendai
• [Presentation] 星間塵表面反応による水と有機物の共進化 (2013)
  • Author(s): 大場康弘
  • Organizer: JPGU meeting 2013
  • Place of Presentation: 幕張メッセ, 千葉市
  • Invited
• [Presentation] Formation of H2O Ice on Cold Interstellar Grains: Reaction Kinetics and the Structure of Ice, Workshop on Ice and Water Films (2013)
  • Author(s): Y. Oba
  • Organizer: Workshop on Ice and Water Films
  • Place of Presentation: Seoul National Univ., South Korea
  • Invited
• [Presentation] Ortho-to-para Ratio of Water Molecules Thermally Desorbed from Ice (2013)
  • Author(s): T. Hama
  • Organizer: Workshop on Ice and Water Films
  • Place of Presentation: Seoul National Univ., South Korea
• [Presentation] 表面への水素・重水素原子照射による吸着原子数密度の同位体依存性 (2013)
  • Author(s): 桑畑和明
  • Organizer: 日本物理学会第68回年次大会
  • Place of Presentation: 広島大学 (東広島市）
• [Presentation] Physics and chemistry of hydrogen on cosmic dust: diffusion, spin temperatures, and water formation (2013)
  • Author(s): N. Watanabe
  • Organizer: First Workshop on Experimental Laboratory Astrophysics
  • Place of Presentation: Sheraton Kauai (USA)
  • Invited
• [Presentation] Experimental measurements of nuclear-spin temperature of thermally desorbed water molecules from ice (2013)
  • Author(s): T. Hama
  • Organizer: First Workshop on Experimental Laboratory Astrophysics
  • Place of Presentation: Sheraton Kauai (USA)
• [Presentation] Hydrogen isotopic fractionation of solid methylamine through atomic-surface reactions at 10K (2013)
  • Author(s): Y. Oba
  • Organizer: First Workshop on Experimental Laboratory Astrophysics
  • Place of Presentation: Sheraton Kauai (USA)
• [Presentation] Surface diffusion mechanism of H and D atoms on amorphous solid water (2013)
  • Author(s): K. Kuwahata
  • Organizer: First Workshop on Experimental Laboratory Astrophysics
  • Place of Presentation: Sheraton Kauai (USA)
• [Presentation] Physicochemical processes of hydrogen on ice: A key for chemical evolution in space (2013)
  • Author(s): N. Watanabe
  • Organizer: 2nd International Symposium on Hierarchy and Holism
  • Place of Presentation: 学術総合センター (東京)
  • Invited
• [Presentation] Surface diffusion mechanism of atomic hydrogen and the ortho/para ratio of nascent H2 molecule on amorphous solid water at around 10 K (2012)
  • Author(s): N. Watanabe
  • Organizer: International Lorentz Center Workshop: Dynamical Phenomena at Surfaces:The Role of Complexity
  • Place of Presentation: Leiden University (The Netherlands)
  • Invited
• [Presentation] Laboratory study of solid H2O formation through quantum tunneling reaction OH + H2 at 10 K (2012)
  • Author(s): Y. Oba
  • Organizer: International Lorentz Center Workshop: Dynamical Phenomena at Surfaces:The Role of Complexity
  • Place of Presentation: Leiden University (The Netherlands)
• [Presentation] Grain surface processes at very low temperatures: hydrogen diffusion and tunneling reactions (2012)
  • Author(s): N. Watanabe
  • Organizer: Gordon Research Conference on Radiation Chemistry
  • Place of Presentation: Proctor Academy (USA)
  • Invited
• [Presentation] Spin temperature of water molecules desorbed from ice produced by photolysis of a CH4/O2 solid mixture and its implication in a cometary coma (2012)
  • Author(s): T. Hama
  • Organizer: Gordon Research Conference on Radiation Chemistry
  • Place of Presentation: Proctor Academy (USA)
• [Presentation] Formation of solid H2O through surface reactions of H2 with OH radicals produced by microwave-induced H2O plasma (2012)
  • Author(s): Y. Oba
  • Organizer: Gordon Research Conference on Radiation Chemistry
  • Place of Presentation: Proctor Academy (USA)
• [Presentation] Hydrogen processes on dust grains: H atom diffusion and water formation (2012)
  • Author(s): N. Watanabe
  • Organizer: 39th COSPAR Scientific Assembly
  • Place of Presentation: Infosys training center (India)
  • Invited
• [Presentation] Formation routes of deuterated formaldehyde and methanol by tunneling reaction on amorphous solid water at 10-20K (2012)
  • Author(s): H. Hidaka
  • Organizer: 39th COSPAR Scientific Assembly
  • Place of Presentation: Infosys training center (India)
  • Invited
• [Presentation] Spin temperatures of hydrogen and water molecules on amorphous solid water (2012)
  • Author(s): N. Watanabe
  • Organizer: Chemical Evolution of Star Forming Region and Origin of Life (ASTROCHEM2012)
  • Place of Presentation: S.N. Bose National Centre (India)
  • Invited
• [Presentation] Formation of deuterated formaldehyde on low temperature surface: isotope effect of quantum tunneling reactions (2012)
  • Author(s): H. Hidaka
  • Organizer: Chemical Evolution of Star Forming Region and Origin of Life (ASTROCHEM2012)
  • Place of Presentation: S.N. Bose National Centre (India)
  • Invited
• [Presentation] Laboratory measurements of spin temperature of water molecules from ice in thermal desorption (2012)
  • Author(s): T. Hama
  • Organizer: Workshop on Interstellar Matter 2012
  • Place of Presentation: 北海道大学 （札幌）
• [Presentation] Deuterium fractionation of methylamine through atomic grain-surface reactions at low temperatures: implication for the possible D/H ratio in molecular clouds (2012)
  • Author(s): Y. Oba
  • Organizer: Workshop on Interstellar Matter 2012
  • Place of Presentation: 北海道大学 （札幌）
• [Presentation] 極低温表面における過酸化水素と水素原子の反応による水生成とその同位体効果 (2012)
  • Author(s): 大場康弘
  • Organizer: 日本地球化学会2012年会
  • Place of Presentation: 九州大学 （福岡市）
• [Remarks] 北海道大学低温科学研究所 宇宙物質・宇宙雪氷グループＨＰ
  • URL: http://www.lowtem.hokudai.ac.jp/astro/index.html
• [Remarks]
  • URL: http://www.lowtem.hokudai.ac.jp/astro/
• [Remarks] http://www.lowtem.hokudai.ac.jp/astro/index.html
• [Remarks] 宇宙物質科学・宇宙雪氷学グループ
  • URL: http://www.lowtem.hokudai.ac.jp/astro/
• [Funded Workshop] Workshop on Interstellar Matter 2016 (2016)
  • Place of Presentation: Hokkaido University, Sapporo
  • Year and Date: 2016-10-19