Low-temperature collisions of NH(X3Σ-) molecules with He atoms in a magnetic field:: An ab initio study -: art. no. 051401

被引：59

作者：

Krems, RV ^{[1
]}

Sadeghpour, HR

Dalgarno, A

Zgid, D

Klos, J

Chalasinski, G

机构：

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

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

[3] Warsaw Univ, Fac Chem, PL-03093 Warsaw, Poland

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

[5] Oakland Univ, Dept Chem, Rochester, MI 48309 USA

来源：

PHYSICAL REVIEW A | 2003年 / 68卷 / 05期

关键词：

D O I：

10.1103/PhysRevA.68.051401

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Ab initio calculations of cross sections and rate constants for elastic scattering and Zeeman relaxation in collisions of NH(X (3)Sigma(-)) molecules with He-3 atoms in a magnetic field are presented and the mechanism for Zeeman transitions in ground-state (3)Sigma molecules is established. The potential surface for He-NH interaction is obtained using all-electron coupled-cluster calculations with single, double, and noniterative triple excitations in a basis set augmented by bond functions. The ratio of the rates for elastic energy transfer and Zeeman relaxation in NH-He-3 collisions exceeds 10(5) at temperatures between 0.5 and 1 K.

引用

页数：4

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