Properties of the ground 3F2 state and the excited 3P0 state of atomic thorium in cold collisions with 3He

被引：2
|
作者：
Au, Yat Shan [1 ,3 ]
Connolly, Colin B. [1 ,3 ]
Ketterle, Wolfgang [2 ,3 ]
Doyle, John M. [1 ,3 ]
机构：
[1] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA
[2] MIT, Dept Phys, Cambridge, MA 02139 USA
[3] Harvard MIT Ctr Ultracold Atoms, Cambridge, MA 02138 USA
来源：
PHYSICAL REVIEW A | 2014年 / 90卷 / 03期
关键词：
D O I：
10.1103/PhysRevA.90.032702
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Inelastic cross sections for collisions between thorium (Th) and helium (He-3) are measured. For Th[F-3(2)]-He-3, we determine the ratio of momentum transfer to Zeeman relaxation cross sections to be gamma similar to 500 at 800 mK. For Th[P-3(0)]-He-3, we find no quenching of this metastable state during 10(6) collisions. We measure the radiative lifetime of Th[P-3(0)] to be tau > 130 ms. The observed stability of Th[P-3(0)] opens up the possibility of trapping this metastable species.
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页数：4
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