Spin-flipping transitions in 2Σ molecules induced by collisions with structureless atoms -: art. no. 060703

被引：64

作者：

Krems, RV ^{[1
]}

Dalgarno, A

Balakrishnan, N

Groenenboom, GC

机构：

[1] Harvard MIT Ctr Ultracold Atoms, Cambridge, MA 02138 USA

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

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

[4] Univ Nijmegen, Inst Theoret Chem, NSRIM, NL-6525 ED Nijmegen, Netherlands

来源：

PHYSICAL REVIEW A | 2003年 / 67卷 / 06期

关键词：

D O I：

10.1103/PhysRevA.67.060703

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

It is shown that spin-flipping transitions in low energy collisions of (2)Sigma diatomic molecules in the lowest rotational N=0 level with structureless atoms proceed through coupling to the rotationally excited N>0 levels, and are determined by the spin-rotation interaction in the rotationally excited molecule. We carry out calculations for collisions of CaH and He-3. For the spin-flip rate coefficient corresponding to an interaction potential that does not generate a shape resonance, we obtain 1.20x10(-17) cm(3) s(-1) at a temperature of 0.4 K consistent with the measured value of 10(-17+/-1) cm(3) s(-1). We make predictions as to which molecules should have the least probability of spin-flipping in collisions with atoms.

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页数：4

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