Degenerate Fermi Gas of 87Sr

被引：182
|
作者：
DeSalvo, B. J. [1 ]
Yan, M. [1 ]
Mickelson, P. G. [1 ]
de Escobar, Y. N. Martinez [1 ]
Killian, T. C. [1 ]
机构：
[1] Rice Univ, Dept Phys & Astron, Houston, TX 77251 USA
来源：
PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 03期
基金：
美国国家科学基金会;
关键词：
ULTRACOLD GASES; ATOMS; SUPERFLUIDITY;
D O I：
10.1103/PhysRevLett.105.030402
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report quantum degeneracy in a gas of ultracold fermionic Sr-87 atoms. By evaporatively cooling a mixture of spin states in an optical dipole trap for 10.5 s, we obtain samples well into the degenerate regime with T/T-F = 0.26(-0.06)(+0.05). The main signature of degeneracy is a change in the momentum distribution as measured by time-of-flight imaging, and we also observe a decrease in evaporation efficiency below T/T-F similar to 0.5.
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页数：4
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