Lifetimes of the 9s and 8p levels of atomic francium -: art. no. 042504

被引：16
|
作者：
Aubin, S [1 ]
Gomez, E [1 ]
Orozco, LA [1 ]
Sprouse, GD [1 ]
机构：
[1] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA
来源：
PHYSICAL REVIEW A | 2004年 / 70卷 / 04期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1103/PhysRevA.70.042504
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We use time-correlated single-photon counting techniques on a sample of Fr-210 atoms confined and cooled in a magneto-optical trap to measure the lifetimes of the 9S(1/2), 8P(3/2), and 8P(1/2) excited levels. We populate the 9S(1/2) level by two-photon resonant excitation through the 7P(1/2) level. The direct measurement of the 9S(1/2) decay through the 7P(3/2) level at 851 nm gives a lifetime of 107.53 +/- 0.90 ns. We observe the decay of the 9S(1/2) level through the 8P(3/2) level at 423 nm and the 8P(1/2) level at 433 nm down to the 7S(1/2) ground level, and indirectly determine the lifetimes of these to be 83.5 +/- 1.5 ns and 149.3 +/- 3.5 ns, respectively.
引用
收藏
页码：042504 / 1
页数：11
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