Formation of water molecule by surface atomic reactions on interstellar grains at low temperatures
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- OBA Yasuhiro
- Institute of Low Temperature Science, Hokkaido University
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- MIYAUCHI Naoya
- Institute of Low Temperature Science, Hokkaido University
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- CHIGAI Takeshi
- Institute of Low Temperature Science, Hokkaido University
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- HIDAKA Hiroshi
- Institute of Low Temperature Science, Hokkaido University
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- WATANABE Naoki
- Institute of Low Temperature Science, Hokkaido University
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- KOUCHI Akira
- Institute of Low Temperature Science, Hokkaido University
Bibliographic Information
- Other Title
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- 極低温星間塵表面原子反応による水分子生成
- キョクテイオンセイ カン ジン ヒョウメン ゲンシ ハンノウ ニ ヨル ミズブンシ セイセイ
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Abstract
Formation of water by reaction of oxygen molecules (O2) with hydrogen atoms (H) were investigated at low temperatures (10-40 K) in order to reveal the possible reaction pathways to yield water on grain surfaces in molecular clouds. Two types of experiments for surface reaction between O2 and H were performed: one of which was that solid O2 was deposited onto the surface, followed by H irradiations to the O2, another of which was that gaseous O2 was continuously codeposited with H onto the surface and was reacted with each other. H2O (D2O) and H2O2 (D2O2) were quickly produced through successive reactions of O2 with H (D). Reaction kinetics and isotope effect are discussed for the former experiment. For the latter experiment, the dependence of compositions of the products on the temperature and O2/H ratio, and also the structure of the H2O ice produced are examined.
Journal
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- Chikyukagaku
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Chikyukagaku 43 (4), 117-131, 2009
The Geochemical Society of Japan
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Details 詳細情報について
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- CRID
- 1390282680719308800
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- NII Article ID
- 110009442257
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- NII Book ID
- AN00141280
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- ISSN
- 21885923
- 03864073
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- NDL BIB ID
- 10559357
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed