On the isotope effect in F+HD reaction at ultracold temperatures

被引：39

作者：

Balakrishnan, N

Dalgarno, A

机构：

[1] Univ Nevada, Dept Chem, Las Vegas, NV 89154 USA

[2] Harvard Smithsonian Ctr Astrophys, Inst Theoret Atom & Mol Phys, Cambridge, MA 02138 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY A | 2003年 / 107卷 / 37期

关键词：

D O I：

10.1021/jp022654v

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Isotope branching in the F + HD reaction is investigated at ultracold temperatures. It is found that in the limit of zero temperatures, the rate coefficient for HF formation in the F + HD (v = 0, j = 0) reaction is a factor of 5.5 greater than that of DF formation. The difference is attributed to the more efficient tunneling of the lighter atom. For HD molecules initially in the j = I excited rotational level, a clear preference is seen for chemical reaction leading to HF and DF products with an HF/DF branching ratio of 5.2 rather than for nonreactive rotational quenching.

引用

收藏

页码：7101 / 7105

页数：5

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