Further analysis of the possible effects of isotope-selective photodissociation on interstellar carbon monoxide
Further analysis of the possible effects of isotope-selective photodissociation on interstellar carbon monoxide
复制标题
进一步分析同位素选择性光解对星际一氧化碳的可能影响
DOI：
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发表时间：
1983
期刊：
影响因子：
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通讯作者：
W. D. Watson
中科院分区：
文献类型：
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作者：
Y. Chu;W. D. Watson
同位素选择性光解的可能影响的丰度比的各种同位素形式的CO分子在星际介质中的重新调查。在这里的研究中，化学分馏包括在反应网络中。虽然同位素选择性光解离在代表性条件下可以原则上改变/sup 16/O比，但是它似乎对/sup 13/CO//sup 12/CO比具有可忽略的影响。此外，发现在存在同位素选择性光解离的情况下，/sup 13/C/sup 15/O//sup 13/C/sup 18/O的比率基本上保持等于/sup 12/C/sup 16/O/sup 12/C/sup 18/O，这也是由于碳同位素的快速化学交换。
The possible influence of isotope-selective photodissociation on the abundance ratios of the various isotopic forms of the CO molecule in the interstellar medium is reinvestigated. In the study here, chemical fractionation is included in the reaction network. Though isotope-selective photodissociation can be principle alter the /sup 16/O ratios under representative conditions, it seems to have negligible impact on the /sup 13/CO//sup 12/CO ratios. In addition, the ratio /sup 13/C/sup 15/O//sup 13/C/sup 18/O is found to remain essentially equal to /sup 12/C/sup 16/O//sup 12/C/sup 18/O in the presence of isotope selective photodissociation due also to the rapid chemical exchange of the carbon isotopes.