Ice surface processes: tunneling reactions and isotope fractionation

冰表面过程：隧道反应和同位素分馏

• 批准号: 21200048
• 负责人: WATANABE Naoki
• 金额: $ 19.8万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research on Innovative Areas (Research a proposed research project)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21200048/
• 关键词: 氷表面反応; トンネル反応; 同位体分別; 星間分子; 星間塵

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.

实验研究了与化学演化和氚分馏有关的冰表面反应。测定了H原子和D原子在冰面扩散的活化能。研究发现，反应体系的有效质量是隧穿反应的控制因素。用有效质量可以很好地解释与甲醛中的重氢有关的隧穿反应的反应性。发现了一种新的冰面CO_2生成途径。

项目成果

Ice surface chemistry of hydrogen atom in space

太空中氢原子的冰表面化学

• 发表时间: 2010
• 作者: N.Watanabe;et al.
• 通讯作者: et al.

Surface processes of atomic hydrogen at very low temperatures relevant to astrochemistry

与天体化学相关的极低温下原子氢的表面过程

• 发表时间: 2010
• 作者: 木元克典;松岡篤;吉野隆;岸本直子;他;N. Watanabe
• 通讯作者: N. Watanabe

Tunneling reactions of atomic hydrogen and molecules on amorphous solid water at very low temperatures

极低温度下原子氢和分子在非晶固体水中的隧道反应

• 发表时间: 2009
• 作者: 中川美幸;加藤知香;渡辺元浩
• 通讯作者: 渡辺元浩

低温アモルファス氷表面における水素原子の拡散・脱離

低温非晶冰表面氢原子的扩散与解吸

• 发表时间: 2009
• 作者: 渡部直樹;香内晃;木村勇気
• 通讯作者: 木村勇気

Formation mechanisms of oxygen atoms in the O(^3P_J)state from the 157nm photoirradiation of amorphous water ice at 90K

90K非晶水冰157nm光照射下O(^3P_J)态氧原子的形成机制

• 发表时间: 2009
• 期刊: Journal of Chemical Physics 131
• 作者: Hama;et al.
• 通讯作者: et al.