Gas-phase production of NHD2 in L134N

被引：63

作者：

Rodgers, SD ^{[1
]}

Charnley, SB ^{[1
]}

机构：

[1] NASA, Ames Res Ctr, Div Space Sci, Moffett Field, CA 94035 USA

来源：

ASTROPHYSICAL JOURNAL | 2001年 / 553卷 / 02期

关键词：

astrochemistry; ISM : individual (L134N); molecular processes;

D O I：

10.1086/320987

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We show analytically that large abundances of NH2D and NHD2 can be produced by gas-phase chemistry in the interiors of cold dense clouds. The calculated fractionation ratios are in good agreement with the values that have been previously determined in L134N and suggest that triply deuterated ammonia could be detectable in dark clouds. Grain-surface reactions may lead to similar NH2D and NHD2 enhancements but, we argue, are unlikely to contribute to the deuteration observed in L134N.

引用

页码：613 / 617

页数：5

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