Thermalization of magnetically trapped metastable helium

被引：13
作者：
Browaeys, A [1 ]
Robert, A [1 ]
Sirjean, O [1 ]
Poupard, J [1 ]
Nowak, S [1 ]
Boiron, D [1 ]
Westbrook, CI [1 ]
Aspect, A [1 ]
机构：
[1] Inst Opt, Lab Charles Fabry, CNRS, UMR 8501, F-91403 Orsay, France
来源：
PHYSICAL REVIEW A | 2001年 / 64卷 / 03期
关键词：
D O I：
10.1103/PhysRevA.64.034703
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We have observed thermalization by elastic collisions of magnetically trapped metastable helium atoms. Our method directly samples the reconstruction of a thermal energy distribution after the application of a RF knife. The relaxation time of our sample toward equilibrium gives an elastic collision rate constant of alpha similar to5 x 10(-9) cm(3)/s at a temperature of 1 mK. This value is close to the unitarity limit.
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页数：4
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