Disalignment transitions in cold collisions of 3P atoms with structureless targets in a magnetic field -: art. no. 013406

被引：37

作者：

Krems, RV

Dalgarno, A

机构：

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

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

来源：

PHYSICAL REVIEW A | 2003年 / 68卷 / 01期

关键词：

D O I：

10.1103/PhysRevA.68.013406

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A method for quantum-mechanical calculations of cross sections for the Zeeman transitions in collisions of P-3 atoms with structureless targets in a magnetic field is presented and applied to the study of magnetic and electronic relaxation in oxygen-helium and carbon-helium collisions at cold and ultracold temperatures. The rate constants for collisionally induced transitions between Zeeman levels in ground-state oxygen have large magnitudes in a 1 T field. It is shown that magnetic fields induce the forbidden P-3(1) --> P-3(0) transition in ultracold collisions of carbon with helium. The cross section vanishes at zero energy for field-free collisions, but becomes infinitely large in a finite magnetic field, varying with velocity v and magnetic field B as B-2/v.

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页数：7

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