Role of cosmic-grain surface reactions in the deuterium fractionationof interstellar molecules

• Project/Area Number: 19340167
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Geochemistry/Astrochemistry
• Research Institution: Hokkaido University
• Principal Investigator: WATANABE Naoki Hokkaido University, 低温科学研究所, 准教授 (50271531)
• Co-Investigator(Kenkyū-buntansha): HIDAKA HIROSHI 北海道大学, 低温科学研究所, 助教 (00400010)
• Project Period (FY): 2007 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000); Fiscal Year 2008: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000); Fiscal Year 2007: ¥11,440,000 (Direct Cost: ¥8,800,000、Indirect Cost: ¥2,640,000)
• Keywords: 重水素濃集 / 星間塵 / 極低温表面反応 / 星間分子

Research Abstract

星間分子の重水素濃集プロセスとして研究代表者らが提唱している極低温星間塵表面反応を, 実験により定量的に評価した. 特に, 高度な重水素濃集が観測で確認されているホルムアルデヒド, メタノールの重水素化表面反応に焦点をあて, 重要な反応経路について実効的な反応速度定数を決定し, 上記分子種に関する重水素濃集の星間塵表面反応ネットワークを完成させた.

Research Products

• [Journal Article] Ice surfacereactions : A key to chemical evolution in space (2008)
  • Author(s): Naoki Watanabe & Akira Kouchi
  • Journal Title: Prog. Surf. Sci. 83 Pages: 439-489
  • Peer Reviewed
• [Journal Article] Release of hydrogen moleculesfrom the photodissociation of amorphous solidwater and polycrystalline ice at 157 and 193 nm (2008)
  • Author(s): A. Yabushita, T. Hama, D. Iida, N. Kawanaka, M. Kawasaki, N. Watanabe, M. N. R. Ashfold, & H-P. Loock
  • Journal Title: J. Chem. Phys. 129 Pages: 44501-44501
  • Peer Reviewed
• [Journal Article] Measurements of energypartitioning in H_2 formation by photolysis ofamorphous water ice (2008)
  • Author(s): A. Yabushita, T. Hama, D. Iida, N. Kawanaka, M. Kawasaki, N. Watanabe, M. N. R. Ashfold, & SH-P. Loock
  • Journal Title: Astrophys. J. 682 Pages: 69-72
  • Peer Reviewed
• [Journal Article] Formation of hydrogen peroxide and water fromthe reaction of cold hydrogen atoms with solidoxygen at 10 K (2008)
  • Author(s): N. Miyauchi, H. Hidaka, T. Chigai, A.Nagaoka, N. Watanabe, A. Kouchi
  • Journal Title: Chem. Phys. Lett. 456 Pages: 27-30
  • Peer Reviewed
• [Journal Article] Structural effects of ice grainsurfaces on the hydrogenation of CO at lowtemperatures (2008)
  • Author(s): H. Hidaka, N. Miyauchi, A. Kouchi &N. Watanabe
  • Journal Title: Chem. Phys. Lett. 456 Pages: 36-40
  • Peer Reviewed
• [Journal Article] Ice surface reactions : A key to chemical evolution in space (2008)
  • Author(s): N. Watanabe & A. Kouchi
  • Journal Title: Progress in Surface Science 83 Pages: 439-489
  • Peer Reviewed
• [Journal Article] Release of hydrogen molecules from the photodissociation of amorphous solid water and polycrystalline ice at 157 and 193 nm (2008)
  • Author(s): A. Yabushita, et.al.
  • Journal Title: Journal of Chemical Physics 129
  • Peer Reviewed
• [Journal Article] Measurements of energy partitioning in H2 formation by photolysis of amorphous water ice (2008)
  • Author(s): A. Yaubushita, et.al.
  • Journal Title: Astrophysical Journal Letters 682
  • Peer Reviewed
• [Journal Article] Formation of hydrogen peroxide and water from the reaction of cold hydrogen atoms with solid oxvnen at 10 K (2008)
  • Author(s): N. Miyauchi, et.al.
  • Journal Title: Chemical Physics Letters 456 Pages: 27-30
  • Peer Reviewed
• [Journal Article] Structural effects of ice grain surfaces on the hydrogenation of CO at low temperatures (2008)
  • Author(s): H. Hidaka, et.al.
  • Journal Title: Chemical Physics Letters 456 Pages: 36-40
  • Peer Reviewed
• [Journal Article] Laboratory Simulation of Competition betweenHydrogenation and Photolysis in the ChemicalEvolution of H2O-CO Ice Mixtures (2007)
  • Author(s): N. Watanabe, O. Mouri, A. Nagaoka, T. Chigai,A. Kouchi & V. Pirronello
  • Journal Title: Astrophys. J. 668 Pages: 1001-1011
  • Peer Reviewed
• [Journal Article] Temperature, composition, and hydrogenisotope effect in the hydrogenation of CO at 10-20 K (2007)
  • Author(s): H. Hidaka, A. Kouchi & N. Watanabe
  • Journal Title: J. Chem. Phys. 126 Pages: 204707-204707
  • Peer Reviewed
• [Journal Article] Effective rate constants for the surface reactionbetween solid methanol and deuterium atoms at10 K (2007)
  • Author(s): A. Nagaoka, N. Watanabe, & A. Kouchi
  • Journal Title: J. Phys. Chem. A 111 Pages: 3016-3028
  • Peer Reviewed
• [Journal Article] アモルファス氷星間塵 : 宇宙における化学進化の舞台 (2007)
  • Author(s): 渡部直樹, 香内晃, 毛利織絵, 長岡明宏, 日高宏
  • Journal Title: J. Vac. Soc. Jpn. (真空) 50 Pages: 282-290
  • Peer Reviewed
• [Journal Article] Effective rate constants for the surface reaction between solid methanol and deuterium atoms at 10 K (2007)
  • Author(s): A. Nagaoka, et. al.
  • Journal Title: Journal of Physical Chemistry A 111 Pages: 3016-3028
  • Peer Reviewed
• [Journal Article] Temperature, composition, and hydrogen isotope effect in the hydrogenation of CO at 10-20 K (2007)
  • Author(s): H. Hidaka, et. al.
  • Journal Title: Journal of Chemical Physics 126 Pages: 204707-204707
  • Peer Reviewed
• [Journal Article] Laboratory simulation of Competition between Hydrogenation and Photolysis in the Chemical Evolution of H_2O-CO Ice Mixtures (2007)
  • Author(s): N. Watanabe, et. al.
  • Journal Title: Astrophyscial Journal 668 Pages: 1001-1011
  • Peer Reviewed
• [Journal Article] アモルファス氷星間塵:宇宙における化学進化の舞台 (2007)
  • Author(s): 渡部直樹, 他
  • Journal Title: J. Vac. Soc. Jpn. (日本真空協会誌) 50 Pages: 282-290
  • Peer Reviewed
• [Presentation] 低温ホルムアルデヒド表面における水素・重水素原子交換反応 (2008)
  • Author(s): 日高宏, 他
  • Organizer: 第7回水素量子アトミクス研究会
  • Place of Presentation: 新潟大
  • Year and Date: 2008-11-21
• [Presentation] 水素原子付加反応による水分子生成機構-アモルファス氷の触媒的効果- (2008)
  • Author(s): 宮内直弥, 他
  • Organizer: 第7回水素量子アトミクス研究会
  • Place of Presentation: 新潟大学
  • Year and Date: 2008-11-21
• [Presentation] 低温ホルムアルデヒド表面における水素・重水素原子交換反応 (2008)
  • Author(s): 日高宏, 他
  • Organizer: 第7回水素量子アトミクス研究会
  • Place of Presentation: 新潟大学
  • Year and Date: 2008-11-21
• [Presentation] 星間空間における化学進化と低温氷表面反応 (2008)
  • Author(s): 渡部直樹
  • Organizer: 原子衝突研究協会第33回研究会
  • Place of Presentation: 北海道大
  • Year and Date: 2008-08-06
• [Presentation] 低温固体表面におけるホルムアルデヒドのH-D交換反応 (2008)
  • Author(s): 日高宏, 他
  • Organizer: 原子衝突研究協会第33回研究会
  • Place of Presentation: 北海道大
  • Year and Date: 2008-08-06
• [Presentation] 低温アモルファス氷上表面原子反応による水分子生成機構 (2008)
  • Author(s): 宮内直弥, 日高宏, 他
  • Organizer: 原子衝突研究協会第33回研究会
  • Place of Presentation: 北海道大
  • Year and Date: 2008-08-06
• [Presentation] 星間空間における化学進化と低温氷表面反応 (2008)
  • Author(s): 渡部直樹
  • Organizer: 原子衝突研究協会年会
  • Place of Presentation: 北海道大学, 札幌
  • Year and Date: 2008-08-06
• [Presentation] 低温固体表面におけるホルムアルデヒドのH-D交換反応 (2008)
  • Author(s): 日高宏, 他
  • Organizer: 原子衝突研究協会年会
  • Place of Presentation: 北海道大学, 札幌
  • Year and Date: 2008-08-06
• [Presentation] 低温アモルファス氷上表面原子反応による水分子生成機構 (2008)
  • Author(s): 宮内直弥, 他
  • Organizer: 原子衝突研究協会年会
  • Place of Presentation: 北海道大学, 札幌
  • Year and Date: 2008-08-06
• [Presentation] 星間塵氷マントル生成 : 水素原子-酸素分子表面反応 (2008)
  • Author(s): 宮内直弥, 大場康弘, 日高宏, 他
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ
  • Year and Date: 2008-05-25
• [Presentation] 星間塵氷マントル生成 : 水素原子-酸素分子表面反応 (2008)
  • Author(s): 北海道大学, 札幌
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ, 千葉
  • Year and Date: 2008-05-25
• [Presentation] Grain surface chemistry fractionation routes (2008)
  • Author(s): N. Watanabe
  • Organizer: The MolecularUniverse : an International Meeting on Physics and Chemistry of the InterstellarMedium
  • Place of Presentation: Arcachon, France
  • Year and Date: 2008-05-08
• [Presentation] The effects of icemorphology in hydrogenation of CO at lowtemperature ice surface (2008)
  • Author(s): H. Hidaka et.al.
  • Organizer: The Molecular Universe : an International Meeting on Physics and Chemistry of the InterstellarMedium
  • Place of Presentation: Arcachon, France
  • Year and Date: 2008-05-08
• [Presentation] Grain surface chemistry fractionation routes (2008)
  • Author(s): N. Watanabe
  • Organizer: The Molecular Universe : an International Meeting on Physics and Chemistry of the Interstellar Medium
  • Place of Presentation: Arcachon, France
  • Year and Date: 2008-05-08
• [Presentation] The effects of ice morphology in hydrogenation of CO at low temperature ice surface (2008)
  • Author(s): H. Hidaka, et.al.
  • Organizer: The Molecular Universe : an International Meeting on Physics and Chemistry of the Interstellar Medium
  • Place of Presentation: Arcachon, France
  • Year and Date: 2008-05-08
• [Presentation] H_2O ICE FORMATION FROM THE REACTION OF COLD H ATOMS WITH SOLID O_2 AT 10 K (2008)
  • Author(s): A. Kouchi, et.al.
  • Organizer: Solar System Ices
  • Place of Presentation: Oxnard, CA, USA
  • Year and Date: 2008-05-05
• [Presentation] 低温氷表面での水素原子付加反応-アモルファスと結晶による違い- (2008)
  • Author(s): 日高宏, 他
  • Organizer: 日本物理学会
  • Place of Presentation: 近畿大, 大阪
  • Year and Date: 2008-03-24
• [Presentation] 低温酸素固体表面への水素原子付加反応 (2008)
  • Author(s): 宮内直弥, 大場康弘, 日高宏, 他
  • Organizer: 日本物理学会
  • Place of Presentation: 近畿大, 大阪
  • Year and Date: 2008-03-24
• [Presentation] 分子雲における表面原子反応による分子進化 (2008)
  • Author(s): 香内晃, 渡部直樹, 他
  • Organizer: アストロバイオロジーワークショップ2008
  • Place of Presentation: 葉山, 神奈川
• [Presentation] 極低温表面原子反応O2+Hによる水分子生成 -アモルファス氷の触媒効果- (2008)
  • Author(s): 大場康弘, 宮内直弥, 日高宏, 他
  • Organizer: 日本惑星科学会秋季講演会
  • Place of Presentation: 九州大学
• [Presentation] Experimental approach tograin surface reactions of hydrogenationand deuterium atoms grain surface reactions of hydrogenation and deuterium atoms (2008)
  • Author(s): N. Watanabe
  • Organizer: International Lorentz Center Workshop : InterstellarSurfaces : From Laboratory to Models
  • Place of Presentation: Leiden Univ., The Netherlands
• [Presentation] Effective rateconstants for H-D substitution reactions inmethanol on the surface at 10 K (2008)
  • Author(s): N. Watanabe et.al.
  • Organizer: Workshop for Interstellar Matter
  • Place of Presentation: Hokkaido Univ
• [Presentation] Laboratory simulationof competition between hydrogenation andphotolysis in the chemical evolution of H2O-CO ice mixtures (2008)
  • Author(s): N. Watanabe et.al.
  • Organizer: Workshop forInterstellar Matter
  • Place of Presentation: Hokkaido Univ
• [Presentation] Structural effects of icygrain surfaces in CO hydrogenation at alow temperature (2008)
  • Author(s): H. Hidaka et.al.
  • Organizer: Workshop forInterstellar Matter
  • Place of Presentation: Hokkaido Univ
• [Presentation] H-D substitutionreactions of formaldehyde on icy grainsurfaces at low temperatures (2008)
  • Author(s): H. Hidaka et.al.
  • Organizer: Workshop for Interstellar Matter
  • Place of Presentation: Hokkaido Univ
• [Presentation] H-Dsubstitution reactions of formaldehyde onicy grain surfaces at low temperatures (2008)
  • Author(s): Y. Oba, N. Miyauchi, H. Hidaka et.al.
  • Organizer: Workshop for Interstellar Matter
  • Place of Presentation: Hokkaido Univ
• [Presentation] 極低温表面原子反応O_2+Hによる水分子生成-アモルファス氷の触媒効果- (2008)
  • Author(s): 大場康弘, 他
  • Organizer: 日本惑星科学会秋季講演会
  • Place of Presentation: 九州大学
• [Presentation] Experimental approach to grain surface reactions of hydrogenation and deuterium atoms (2008)
  • Author(s): N. Watanabe
  • Organizer: International Lorentz Center Workshop : Interstellar Surfaces: From Laboratory to Models
  • Place of Presentation: Leiden Univ., The Netherlands
• [Presentation] Effective rate constants for H-D substitution reactions in methanol on the surface at 10 K (2008)
  • Author(s): N. Watanabe, et.al.
  • Organizer: Workshop for Interstellar Matter 2008
  • Place of Presentation: Hokkaido Univ., JAPAN
• [Presentation] Laboratory simulation of competition between hydrogenation and photolysis in the chemical evolution of H_2O-CO ice mixtures (2008)
  • Author(s): N. Watanabe, et.al.
  • Organizer: Workshop for Interstellar Matter 2008
  • Place of Presentation: Hokkaido Univ., JAPAN
• [Presentation] Structural effects of icy grain surfaces in CO hydrogenation at a low temnerature (2008)
  • Author(s): H. Hidaka, et.al.
  • Organizer: Workshop for Interstellar Matter 2008
  • Place of Presentation: Hokkaido Univ., JAPAN
• [Presentation] H-D substitution reactions of formaldehyde on icy grain surfaces at low temperatures (2008)
  • Author(s): H. Hdaka, et.al.
  • Organizer: Workshop for Interstellar Matter 2008
  • Place of Presentation: Hokkaido Univ., JAPAN
• [Presentation] Effective formation of H2O by the H-addition to solid O_2 on amorphous D_2O ice (2008)
  • Author(s): Y. Oba, et.al.
  • Organizer: Workshop for Interstellar Matter 2008
  • Place of Presentation: Hokkaido Univ., JAPAN
• [Presentation] 水素原子付加反応による水分子生成機構 -アモルファス氷の触媒的効果- (2007)
  • Author(s): 宮内直弥, 日高宏, 他
  • Organizer: 第7回水素量子アトミクス研究会
  • Place of Presentation: 新潟大
  • Year and Date: 2007-11-21
• [Presentation] UV光によるH_2O氷のアモルファス化 (2007)
  • Author(s): 高遠徳尚, 長岡明宏, 渡部直樹, 香内晃
  • Organizer: 日本天文学会
  • Place of Presentation: 岐阜大
  • Year and Date: 2007-09-28
• [Presentation] Laboratory study of chemical processes on interstellar ice grains (2007)
  • Author(s): N. Watanabe et.al.
  • Organizer: Extraterrestrial ice, IUGG General Assembly
  • Place of Presentation: Perugia, Italy
  • Year and Date: 2007-07-11
• [Presentation] Laboratory study of chemical processes on interstellar ice grains (2007)
  • Author(s): N. Watanabe, et. al.
  • Organizer: Extraterrestrial ice, IUGG General Assembly
  • Place of Presentation: Campas of the University of Perugia, Italy,
  • Year and Date: 2007-07-11
• [Presentation] UV光による氷のアモルファス化の温度依存性 (2007)
  • Author(s): 高遠徳尚, 長岡明宏, 渡部直樹, 香内晃
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ
  • Year and Date: 2007-05-24
• [Presentation] H_2O氷表面におけるCO分子-水素原子反応 : アモルファス氷vs. 結晶氷 (2007)
  • Author(s): 日高宏, 他
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ
  • Year and Date: 2007-05-24
• [Presentation] Chemicalevolution of CO molecule on interstellar grainsurfaces : Photolysis vs. Hydrogenation (2007)
  • Author(s): 長岡明宏, 渡部直樹, 他
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ
  • Year and Date: 2007-05-24
• [Presentation] H_2O氷表面におけるCO分子-水素原子反応:アモルファス氷vs.結晶氷 (2007)
  • Author(s): 日高 宏 他
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ
  • Year and Date: 2007-05-24
• [Presentation] Chemical evolution of CO molecule on interstellar grain surfaces:Photolysis vs. Hydrogenation (2007)
  • Author(s): 長岡明宏 他
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ
  • Year and Date: 2007-05-24
• [Presentation] Evolution of CO molecule on ice covered grains (2007)
  • Author(s): N. Watanabe
  • Organizer: nternational Astrophysics and Astrochemistry Meeting : Molecules in Space & Laboratory
  • Place of Presentation: Paris, France
  • Year and Date: 2007-05-14
• [Presentation] The structural effects ofice grain surfaces on the hydrogenation at lowtemperatures (2007)
  • Author(s): H. Hidaka et.al.
  • Organizer: International Astrophysics and Astrochemistry Meeting : Molecules in Space & Laboratory
  • Place of Presentation: Paris, France
  • Year and Date: 2007-05-14
• [Presentation] Evolution of CO molecule on ice covered grains (2007)
  • Author(s): N. Watanabe, et. al.
  • Organizer: International Astrophysics and Astrochemistry Meeting: Molecules in Space&Laboratory
  • Place of Presentation: MEN Carre des Science Paris, France
  • Year and Date: 2007-05-14
• [Presentation] The structural effects of ice grain surfaces on the hydrogenation at lowtemperatures (2007)
  • Author(s): H. Hidaka, et. al.
  • Organizer: International Astrophysics and Astrochemistry Meeting: Molecules in Space&Laboratory
  • Place of Presentation: MEN Carre des Science Paris, France
  • Year and Date: 2007-05-14