WATER FORMATION THROUGH A QUANTUM TUNNELING SURFACE REACTION, OH + H2, AT 10 K

被引：91

作者：

Oba, Y. ^{[1
]}

Watanabe, N. ^{[1
]}

Hama, T. ^{[1
]}

Kuwahata, K. ^{[1
]}

Hidaka, H. ^{[1
]}

Kouchi, A. ^{[1
]}

机构：

[1] Hokkaido Univ, Inst Low Temp Sci, Sapporo, Hokkaido 0600819, Japan

来源：

ASTROPHYSICAL JOURNAL | 2012年 / 749卷 / 01期

基金：

日本学术振兴会;

关键词：

astrobiology; astrochemistry; atomic processes; ISM: clouds; ISM: molecules; OPTICAL-EMISSION SPECTROSCOPY; EFFECTIVE RATE CONSTANTS; ABSOLUTE RATE-CONSTANT; AMORPHOUS SOLID WATER; HYDROGEN-PEROXIDE; 10; K; CHEMICAL-REACTIONS; ORGANIC-MOLECULES; INTERSTELLAR ICES; SPIN TEMPERATURE;

D O I：

10.1088/0004-637X/749/1/67

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The present study experimentally demonstrated that solid H2O is formed through the surface reaction OH + H-2 at 10 K. This is the first experimental evidence of solid H2O formation using hydrogen in its molecular form at temperatures as low as 10 K. We further found that H2O formation through the reaction OH + H-2 is about one order of magnitude more effective than HDO formation through the reaction OH + D-2. This significant isotope effect results from differences in the effective mass of each reaction, indicating that the reactions proceed through quantum tunneling.

引用

页数：12

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