Ice surface processes: tunneling reactions and isotope fractionation

2011 Fiscal Year Final Research Report

• Project/Area Number: 21200048
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research a proposed research project)
• Allocation Type: Single-year Grants
• Research Field: Geochemistry/Astrochemistry; Atomic/Molecular/Quantum electronics
• 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): HIDAKA Hiroshi 北海道大学, 低温科学研究所, 助教 (00400010)
• Project Period (FY): 2009 – 2011
• Keywords: 氷表面反応 / トンネル反応 / 同位体分別 / 星間分子

Research Abstract

Ice surface reactions relevant to chemical evolution and deuterium fractionation were experimentally investigated. Activation energies for ice-surface diffusion of H and D atoms were determined. It was found that effective mass of reaction system is a control-factor of tunneling reactions. The reactivities of tunneling reactions related to deuterium fraction of formaldehyde can be well explained by the effective masses. A novel route of CO_2 formation on the ice surface was found.

Research Products

• [Journal Article] Water Formation Through a Quantum Tunneling Surface Reaction, OH+H_2, at 10K (2012)
  • Author(s): Y. Oba, N. Watanabe, T. Hama, K. Kuwahata, H. Hidaka, A. Kouchi
  • Journal Title: Astrophys.J. Volume: 749 Pages: 67(12)
  • DOI: DOI:10.1088/0004-637X/749/1/67
  • Peer Reviewed
• [Journal Article] FTIR study of ammonia formation via the successive hydrogenation of N atoms trapped in a solid N_2 matrix at low temperatures (2011)
  • Author(s): H. Hidaka, M. Watanabe, A. Kouchi and N. Watanabe
  • Journal Title: Phys. Chem. Chem. Phys. Volume: 13, 35 Pages: 15798-15802
  • DOI: DOI:10.1039/c1cp20645a
  • Peer Reviewed
• [Journal Article] Experimental studies of surface reactions among OH radicals that yield H_2O and CO_2 at 40-60 K (2011)
  • Author(s): Y. Oba, N. Watanabe, A. Kouchi, T. Hama and V. Pirronello
  • Journal Title: Phys. Chem. Chem. Phys. Volume: 13, 35 Pages: 15792-15797
  • DOI: DOI:10.1039/c1cp20596j
  • Peer Reviewed
• [Journal Article] Surface abundance change in vacuum ultraviolet photodissociation of CO_2 and H_2O mixture ices (2011)
  • Author(s): T. Kinugawa, A. Yabushita, M. Kawasaki, T. Hama and N.Watanabe
  • Journal Title: Phys. Chem. Chem. Phys. Volume: 13, 35 Pages: 15785-15791
  • DOI: DOI:10.1039/C1CP20595A
  • Peer Reviewed
• [Journal Article] Spin Temperature of Water Molecules Desorbed from the Surfaces of Amorphous Solid Water, Vapor-deposited and Produced from Photolysis of a CH_4/O_2 Solid Mixture (2011)
  • Author(s): Hama,T., Watanabe,N., Kouchi,A., Yokoyama, M.
  • Journal Title: Astrophys. J. Lett. Volume: 738, 1 Pages: L15(5)
  • DOI: DOI:10.1088/2041-8205/738/1/L15
  • Peer Reviewed
• [Journal Article] Translational and rotational energy measurements of desorbed water molecules in their vibrational ground state following 157 nm irradiation of amorphous solid water (2011)
  • Author(s): T. Hama, M. Yokoyama, A. Yabushita, M. Kawasaki, N. Watanabe
  • Journal Title: Nucl. Instr. Methods B Volume: 269,9 Pages: 1011-1015
  • DOI: DOI:10.1016/j.nimb.2010.12.031
  • Peer Reviewed
• [Journal Article] 星間分子雲における二酸化炭素生成に関する実験的研究 (2011)
  • Author(s): 大場康弘,渡部直樹,香内晃,羽馬哲也,ピロネロ バレリオ
  • Journal Title: 地球化学 Volume: 45 Pages: 213-226
  • Peer Reviewed
• [Journal Article] Formation of Carbonic Acid (H_2CO_3) by Surface Reactions of Non-energetic OH Radicals with CO Molecules at Low Temperatures (2010)
  • Author(s): Y. Oba, N. Watanabe, A. Kouchi, T. Hama, V. Pirronello
  • Journal Title: Astrophys. J. Volume: 722 Pages: 1598-1606
  • DOI: DOI:10.1088/0004-637X/722/2/1598
  • Peer Reviewed
• [Journal Article] Direct measurements of hydrogen atom diffusion and the spin temperature of nascent H_2 molecule on amorphous solid water (2010)
  • Author(s): N. Watanabe, Y. Kimura, A. Kouchi, T. Chigai, T. Hama, & V. Pirronello
  • Journal Title: Astrophys. J. Lett. Volume: 714 Pages: L233
  • DOI: DOI:10.1088/2041-8205/714/2/L233
  • Peer Reviewed
• [Journal Article] A desorption mechanism of water following vacuum-ultraviolet irradiation on amorphous solid water at 90 K (2010)
  • Author(s): T. Hama, M. Yokoyama, A. Yabushita, M. Kawasaki, S. Andersson, C.M. Western, M.N.R. Ashfold, R.N. Dixon, & N. Watanabe
  • Journal Title: J. Chem. Phys. Volume: 132 Pages: 164508
  • DOI: DOI:10.1063/1.3386577
  • Peer Reviewed
• [Journal Article] Direct evidence for ammonium ion formation in ice through ultraviolet-induced acid-base reaction of NH_3 with H_3O^+ (2010)
  • Author(s): E-S. Moon, H. Kang, Y. Oba, N. Watanabe, A. Kouchi
  • Journal Title: Astrophys. J. Volume: 713 Pages: 906
  • DOI: DOI:10.1088/0004-637X/713/2/906
  • Peer Reviewed
• [Journal Article] Experimental study of CO_2 formation by surface reactions of non-energetic OH radicals with CO molecules (2010)
  • Author(s): Y. Oba, N. Watanabe, A. Kouchi, T. Hama, V. Pirronello
  • Journal Title: Astrophys. J. Lett. Volume: 712 Pages: L174
  • DOI: DOI:10.1088/2041-8205/712/2/L174
  • Peer Reviewed
• [Journal Article] 極低温星間塵表面原子反応による水分子生成 (2009)
  • Author(s): 大場康弘,宮内直弥,千貝健,日高宏,渡部直樹,香内晃
  • Journal Title: 地球化学 Volume: 43 Pages: 117-131
  • Peer Reviewed
• [Journal Article] 宇宙における水分子生成過程の解明に至るまで (2009)
  • Author(s): 香内晃 ,渡部直樹
  • Journal Title: 雪氷 Volume: 71 Pages: 395-401
  • Peer Reviewed
• [Presentation] 桑畑和明,羽馬哲也,渡部直樹,香内晃「アモルファス氷表面で生成した水素分子のオルソ・パラ比とその時間変化 (2012)
  • Author(s): 桑畑和明, 羽馬哲也, 渡部直樹, 香内晃
  • Organizer: 日本物理学会第67回年次大会
  • Place of Presentation: 関西学院大学(西宮市)
  • Year and Date: 2012-03-24
• [Presentation] 共鳴多光子イオン化法による氷から熱脱離した水分子の原子核スピン温度測定実験 (2012)
  • Author(s): 羽馬哲也, 渡部直樹, 香内晃
  • Organizer: 日本物理学会第67回年次大会
  • Place of Presentation: 関西学院大学(西宮市)
  • Year and Date: 2012-03-24
• [Presentation] Low-temperature Surface Reactions of Non-energetic OH Radicals of Astrophysical Interest (2012)
  • Author(s): Y. Oba, N. Watanabe, T. Hama, A. Kouchi and V. Pirronello
  • Organizer: 18th Symposium on Atomic, Cluster, and Surface Physics (SASP2012)
  • Place of Presentation: The Conference Center de l'Alpe d'Huez(France)
  • Year and Date: 2012-01-25
• [Presentation] Hydrogen Chemistry on cold surfaces (2012)
  • Author(s): N. Watanabe
  • Organizer: 18th Symposium on Atomic, Cluster, and Surface Physics (SASP2012)
  • Place of Presentation: The Conference Center de l'Alpe d'Huez(France)(invited)
  • Year and Date: 2012-01-24
• [Presentation] Spin temperature measurement of thermally desorbed water molecules from water ice prepared at 8K (2012)
  • Author(s): T. Hama, N. Watanabe and A. Kouchi
  • Organizer: 18th Symposium on Atomic, Cluster, and Surface Physics (SASP2012)
  • Place of Presentation: The Conference Center de l'Alpe d'Huez(France)
  • Year and Date: 2012-01-23
• [Presentation] Nonenergetic processes on grain surfaces (2011)
  • Author(s): N. Watanabe
  • Organizer: Mini-Workshop on Gas-Grain Interactions in Interstellar Clouds
  • Place of Presentation: Univ. of Tokyo(Tokyo)
  • Year and Date: 2011-10-28
• [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 (2011)
  • Author(s): 中井陽一, 日高宏, 渡部直樹, 小島隆夫
  • Organizer: 日本物理学会秋季大会
  • Place of Presentation: 富山大学(富山市)
  • Year and Date: 2011-09-24
• [Presentation] 重水素原子の低温氷表面における拡散 (2011)
  • Author(s): 羽馬哲也, 渡部直樹, 香内晃, V. Pirronello
  • Organizer: 日本物理学会秋季大会
  • Place of Presentation: 富山大学(富山市)
  • Year and Date: 2011-09-23
• [Presentation] 星間物質表面での水素反応 (2011)
  • Author(s): 渡部直樹
  • Organizer: 日本物理学会秋季大会
  • Place of Presentation: 富山大学(富山市)(招待)
  • Year and Date: 2011-09-22
• [Presentation] 低温表面反応による水分子生成とその同位体効果 (2011)
  • 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: 北海道大学(札幌市)
  • Year and Date: 2011-09-16
• [Presentation] 低温の星間塵表面における窒素原子への水素原子付加反応によるアンモニア生成 (2011)
  • Author(s): 日高宏, 香内晃, 渡部直樹
  • Organizer: 日本地球化学会年会
  • Place of Presentation: 北海道大学(札幌市)
  • Year and Date: 2011-09-16
• [Presentation] 星間塵表面におけるメチルアミンの水素同位体交換反応 (2011)
  • Author(s): 大場康弘, 渡部直樹, 香内晃
  • Organizer: 第29回有機地球化学シンポジウム
  • Place of Presentation: 九州大学(福岡市)
  • Year and Date: 2011-09-01
• [Presentation] アモルファス氷表面における水素原子の拡散メカニズム (2011)
  • Author(s): 羽馬哲也, 渡部直樹, 香内晃, 木村勇気, V. Pirronello
  • Organizer: 第9回水素量子アトミクス研究会
  • Place of Presentation: 東北大学(仙台市)
  • Year and Date: 2011-08-23
• [Presentation] Hydrogen tunneling reaction and its isotope effect at a low temperature ice surface: Origin of deuterium enrichments in interstellar formaldehyde and methanol (2011)
  • Author(s): N. Watanabe, H. Hidaka, A. Kouchi
  • Organizer: International Conference on the Research of Chemistry and Physics of Matrix Isolated Species (MATRIX2011)
  • Place of Presentation: University of British Columbia (Canada)(invited)
  • Year and Date: 2011-07-11
• [Presentation] REMPI measurements of spin temperatures of desorbed water molecules from vapor-deposited and photo-produced amorphous solid water at 8 K (2011)
  • Author(s): T. Hama, N. Watanabe, A. Kouchi, M. Yokoyama
  • Organizer: 第27回化学反応討論会
  • Place of Presentation: 東京工業大学(東京都目黒区)
  • Year and Date: 2011-06-09
• [Presentation] Sequential hydrogenation of molecular oxygen on cold surfaces: reaction kinetics and structure of formed H_2O ice (2011)
  • Author(s): Y. Oba, N. Miyauchi, H. Hidaka, T. Chigai, N. Watanabe, A. Kouchi
  • Organizer: IAU Symposium280: The Molecular Universe
  • Place of Presentation: University of Castilla-La Mancha(Spain)
  • Year and Date: 2011-06-02
• [Presentation] Neutral radical-molecule reactions CO+OH on cold interstellar ices (2011)
  • Author(s): Y. Oba, N. Watanabe, A. Kouchi, T. Hama, V. Pirronello
  • Organizer: IAU Symposium 280: The Molecular Universe
  • Place of Presentation: University of Castilla-La Mancha(Spain)
  • Year and Date: 2011-06-02
• [Presentation] FTIR measurements of ammonia formation by the successive H-atom addition to N-atom in an N_2 matrix at 10K (2011)
  • Author(s): H. Hidaka, M. Watanabe, A. Kouchi, N. Watanabe
  • Organizer: IAU Symposium280: The Molecular Universe
  • Place of Presentation: University of Castilla-La Mancha(Spain)
  • Year and Date: 2011-06-02
• [Presentation] Diffusion mechanism of hydrogen and deuterium atoms and the spin temperature of molecules on the surface of water ice at 8 - 15 K (2011)
  • Author(s): T. Hama, N. Watanabe, Y. Kimura, A. Kouchi, T. Chigai, V. Pirronello
  • Organizer: IAU Symposium280: The Molecular Universe
  • Place of Presentation: University of Castilla-La Mancha(Spain)
  • Year and Date: 2011-06-02
• [Presentation] アモルファス氷への真空紫外光照射による水分子脱離メカニズム (2011)
  • Author(s): 羽馬哲也, 横山正明, 薮下彰啓, 川崎昌博, 渡部直樹
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ(千葉県)
  • Year and Date: 2011-05-26
• [Presentation] 素および重水素原子の氷表面拡散と水素分子生成 (2011)
  • Author(s): 羽馬哲也, 渡部直樹, 木村勇気, 香内晃, 千貝健
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ(千葉県)
  • Year and Date: 2011-05-23
• [Presentation] 高密度分子雲内部におけるラジカル-分子表面反応による二酸化炭素生成 (2011)
  • Author(s): 大場康弘, 渡部直樹, 香内晃, 羽馬哲也, ピロネロ バレリオ
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ(千葉県)
  • Year and Date: 2011-05-23
• [Presentation] 水素-窒素原子低温表面反応によるアンモニア分子生成 (2011)
  • Author(s): 日高宏, 香内晃, 渡部直樹
  • Organizer: 日本物理学会第66回年次大会
  • Place of Presentation: 新潟大学(新潟市)
  • Year and Date: 2011-03-28
• [Presentation] 低温氷表面に吸着した水素原子の拡散メカニズム (2011)
  • Author(s): 羽馬哲也, 渡部直樹, 香内晃, 木村勇気, V. Pirronello
  • Organizer: 日本物理学会第66回年次大会
  • Place of Presentation: 新潟大学(新潟市)
  • Year and Date: 2011-03-28
• [Presentation] 氷表面反応による星間分子の重水素濃集 (2011)
  • Author(s): 渡部直樹
  • Organizer: 2010年度宇宙空間原子分子過程研究会-星間分子から量子縮退気体まで
  • Place of Presentation: JAXA(神奈川県)
  • Year and Date: 2011-02-16
• [Presentation] イオン誘起微粒子核生成：素過程からのアプローチ (2011)
  • Author(s): 渡部直樹
  • Organizer: 豊田理化学研究所特定課題研究・低温科学研究所共同利用「核生成の学理と応用」低温科学研究所共同利用「その場観察と理論による氷結晶成長カイネティクスの解明」合同研究会
  • Place of Presentation: 北海道大学(札幌市)
  • Year and Date: 2011-02-04
• [Presentation] Ammonia formation by the successive hydrogenation of N atom trapped solid N_2 at low temperature (2010)
  • Author(s): H. Hidaka, M. Watanabe, A. Kouchi, N. Watanabe
  • Organizer: ISM2010
  • Place of Presentation: Hokkaido Univ.(Sapporo)
  • Year and Date: 20100913-15
• [Presentation] Laboratory measurements of atomic hydrogen diffusion and the ortho-para conversion of nascent H_2 molecules on amorphous solid water (2010)
  • Author(s): N. Watanabe, T. Hama, A. Kouchi, T. Chigai, V. Pirronello, Y. Kimura
  • Organizer: ISM2010
  • Place of Presentation: Hokkaido Univ.(Sapporo)
  • Year and Date: 20100913-15
• [Presentation] Spectroscopic approach to physicochemical processes on ices at low temperatures (2010)
  • Author(s): T. Hama, M. Yokoyama, A. Kouchi, N. Watanabe
  • Organizer: Pacifichem 2010
  • Place of Presentation: Sheraton Waikiki (U.S.A)
  • Year and Date: 2010-12-18
• [Presentation] Ammonia formation by the successive hydrogenation of N atom trapped in solid N_2 at below 30K (2010)
  • Author(s): H. Hidaka, M. Watanabe, A. Kouchi, N. Watanabe
  • Organizer: Pacifichem 2010
  • Place of Presentation: Sheraton Waikiki (U.S.A)
  • Year and Date: 2010-12-18
• [Presentation] Experimental studies on surface reactions of CO molecules with cold OH radicals at 10-40 K (2010)
  • Author(s): Y. Oba, N. Watanabe, A. Kouchi, T. Hama, V. Pirronello
  • Organizer: Pacifichem 2010
  • Place of Presentation: Sheraton Waikiki (U.S.A)
  • Year and Date: 2010-12-18
• [Presentation] 低温氷表面での原子分子過程と化学進化 (2010)
  • Author(s): 渡部直樹
  • Organizer: 理研シンポジウム：第1回拡がる原子分子物理研究：宇宙空間における原子分子進化過程
  • Place of Presentation: (独)理化学研究所(埼玉県)
  • Year and Date: 2010-12-03
• [Presentation] Structure of H_2O ice formed by surface reactions of oxygen molecules with hydrogen atoms at low temperatures (2010)
  • Author(s): Y. Oba, N. Miyauchi, T. Chigai, H. Hidaka, N. Watanabe, A. Kouchi
  • Organizer: PCI2010
  • Place of Presentation: Hokkaido Univ.(Sapporo)
  • Year and Date: 2010-09-10
• [Presentation] Observational evidences of interstellar icy mantles on dust grains and laboratory investigations of physico-chemical processes (2010)
  • Author(s): V. Pirronello, T. Hama, H. Hidaka, A. Kouchi, Y. Oba, N. Watanabe
  • Organizer: PCI2010
  • Place of Presentation: Hokkaido Univ.(Sapporo)
  • Year and Date: 2010-09-09
• [Presentation] Effect of amorphous solid water on surface tunneling reactions of atomic hydrogen (2010)
  • Author(s): N. Watanabe, H. Hidaka, A. Kouchi, A. Nagaoka
  • Organizer: PCI2010
  • Place of Presentation: Hokkaido Univ.(Sapporo)
  • Year and Date: 2010-09-09
• [Presentation] Morphology effects in hydrogenation of CO at low temperature ice surfaces (2010)
  • Author(s): H. Hidaka, N. Miyauchi, A. Kouchi, N. Watanabe
  • Organizer: PCI2010
  • Place of Presentation: Hokkaido Univ.(Sapporo)
  • Year and Date: 2010-09-09
• [Presentation] Photodesorptions of OH radical and oxygen atom following vacuum ultraviolet photodissociation of water ice (2010)
  • Author(s): T. Hama, A. Yabushita, M. Kawasaki, N. Watanabe
  • Organizer: PCI2010
  • Place of Presentation: Hokkaido Univ.(Sapporo)
  • Year and Date: 2010-09-08
• [Presentation] Desorption mechanisms of photoproducts following 157 nm irradiation of water ice (2010)
  • Author(s): T. Hama, A. Yabushita, M. Kawasaki, N. Watanabe
  • Organizer: 27th European Conference on Surface Science (ECOSS 27)
  • Place of Presentation: Martini plaza (The Netherlands)
  • Year and Date: 2010-08-30
• [Presentation] Ice surface chemistry of hydrogen atom in spac (2010)
  • Author(s): N. Watanabe, H. Hidaka, T. Hama, A. Kouchi, T. Chigai, Y. Kimura
  • Organizer: 27th European Conference on Surface Science (ECOSS 27)
  • Place of Presentation: Martiniplaza (The Netherlands)(invited)
  • Year and Date: 2010-08-30
• [Presentation] 水素原子のアモルファス氷表面拡散と水素分子生成 (2010)
  • Author(s): 羽馬哲也, 木村勇気, 香内晃, 渡部直樹
  • Organizer: 原子衝突研究協会第35回年会
  • Place of Presentation: 奈良女子大学(奈良市)
  • Year and Date: 2010-08-11
• [Presentation] Surface processes of atomic hydrogen at very low temperatures relevant to astrochemistry (2010)
  • Author(s): N. Watanabe
  • Organizer: 24th International Conference on Atomic Collisions in Solids, ICACS-24
  • Place of Presentation: Jagiellonian University (Poland)(invited)
  • Year and Date: 2010-07-22
• [Presentation] Chemisrty of atomic hydrogen on interstellar ice grains at very low temperatures (2010)
  • Author(s): N. Watanabe, H. Hidaka, A. Kouchi, T. Hama, Y. Kimura
  • Organizer: Western Pacific Geophysics Meeting: Laboratory Simulations for Astrophysics
  • Place of Presentation: Taipei International Convention Center (Taiwan)(invited)
  • Year and Date: 2010-06-23
• [Presentation] Formation of Compact Amorphous Water Ice by Surface Atomic Reactions at Low Temperatures (2010)
  • Author(s): A. Kouchi, Y. Oba, N. Miyauchi, H. Hidaka, T. Chigai, N. Watanabe
  • Organizer: Western Pacific Geophysics Meeting
  • Place of Presentation: Taipei International Convention Center (Taiwan)
  • Year and Date: 2010-06-23
• [Presentation] Surface Reactions of CO Molecules with OH Radicals at Low Temperatures (2010)
  • Author(s): Y. Oba, N. Watanabe, A. Kouchi, T. Hama, V. Pirronello
  • Organizer: Western Pacific Geophysics Meeting
  • Place of Presentation: Taipei International Convention Center (Taiwan)
  • Year and Date: 2010-06-23
• [Presentation] A desorption mechanism of water following vacuum-ultraviolet irradiation on amorphous solid water at 90 K (2010)
  • Author(s): M. Yokoyama, T. Hama, A.Yabushita, M. Kawasaki, S. Andersson, C. M.Western, M. N. R. Ashfold, R. N. Dixon, N. Watanabe
  • Organizer: 第26回化学反応討論会
  • Place of Presentation: 広島大学(東広島市)
  • Year and Date: 2010-06-02
• [Presentation] Physicochemical processes of atomic hydrogen on amorphous solid water at very low temperatures (2010)
  • Author(s): N. Watanabe
  • Organizer: 239th American Chemical Society National Meeting & Exposition
  • Place of Presentation: Moscone Center, (USA)(invited)
  • Year and Date: 2010-03-24
• [Presentation] Ice surface reactions: its role in chemical evolution in space (2009)
  • Author(s): N. Watanabe
  • Organizer: ILTS International Symposium "Frontier of Low Temperature Science"
  • Place of Presentation: Hokkaido Univ.(Sapporo)
  • Year and Date: 2009-11-10
• [Presentation] Tunneling reactions of atomic hydrogen and molecules on amorphous solid water at very low temperatures (2009)
  • Author(s): N. Watanabe, A. Kouchi, H. Hidaka, Y. Oba, N. Miyauchi, Y. Kimura
  • Organizer: Horiba-ISSP International Symposium on Hydrogen and Water in Condensed Matter Physics
  • Place of Presentation: Seimei-no-Mori resort (Chiba)(invited)
  • Year and Date: 2009-10-16
• [Presentation] Quantum tunneling in the H-D substitution and the H (D) atom addition reactions of formaldehyde on low temperature surfaces (2009)
  • Author(s): H. Hidaka, M. Watanabe, A. Kouchi, N. Watanabe
  • Organizer: Horiba-ISSP International Symposium on Hydrogen and Water in Condensed Matter Physics
  • Place of Presentation: Seimei-no-Mori resort (Chiba)
  • Year and Date: 2009-10-13
• [Presentation] 低温固体表面における水素,窒素原子結合反応によるアンモニア分子生成 (2009)
  • Author(s): 日高宏, 渡辺元浩, 香内晃, 渡部直樹
  • Organizer: 日本惑星科学会秋季講演会
  • Place of Presentation: 東京大学(東京都)
  • Year and Date: 2009-09-29
• [Presentation] 低温ホルムアルデヒド固体表面における水素・重水素原子トンネル反応 (2009)
  • Author(s): 日高宏, 渡辺元浩, 香内晃, 渡部直樹
  • Organizer: 日本物理学会秋季大会
  • Place of Presentation: 熊本大学(熊本市)
  • Year and Date: 2009-09-27
• [Presentation] 低温アモルファス氷表面における水素原子の拡散・脱離 (2009)
  • Author(s): 渡部直樹, 香内晃, 木村勇気
  • Organizer: 日本物理学会秋季大会
  • Place of Presentation: 熊本大学(熊本市)
  • Year and Date: 2009-09-27
• [Presentation] 極低温表面反応CO+OHによるCO_2分子生成 (2009)
  • Author(s): 大場康弘, 渡部直樹, 日高宏, 香内晃, Varelio Pirronello
  • Organizer: 日本地球化学会第56回年会
  • Place of Presentation: 広島大学(東広島市)
  • Year and Date: 2009-09-16
• [Remarks]
  • URL: http://www.lowtem.hokudai.ac.jp/astro/