Observation of a zero-energy resonance in Cs-Cs collisions

被引：113

作者：

Arndt, M

BenDahan, M

GueryOdelin, D

Reynolds, MW

Dalibard, J

机构：

[1] UNIV AMSTERDAM,VAN DER WAALS ZEEMAN INST,NL-1018 XE AMSTERDAM,NETHERLANDS

[2] LAB KASTLER BROSSEL,F-75231 PARIS 05,FRANCE

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.79.625

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We measure the cross section for s-wave collisions of Cs atoms in a magnetic trap. From the relaxation of the atomic cloud towards thermal equilibrium, we infer that the cross section varies as 1/T over the temperature range T = 5-60 mu K. It takes at each measured temperature the maximum allowed value for polarized bosons. This indicates a zero-energy resonance generated by a bound or virtual state less than 5 mu K from the dissociation threshold.

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页码：625 / 628

页数：4

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