Lifetime measurement of the 3P2 metastable state of strontium atoms.
Lifetime measurement of the 3P2 metastable state of strontium atoms.
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DOI：
10.1103/physrevlett.92.153004
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发表时间：
2003-10
影响因子：
8.6
通讯作者：
M. Yasuda;H. Katori
中科院分区：
文献类型：
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作者：
M. Yasuda;H. Katori
我们测量了锶原子5s 5 p3 P2亚稳态的寿命，通过磁光捕获衰变原子到基态，这允许灵敏地检测罕见的衰变事件。我们发现，黑体辐射诱导的衰变是T=300 K状态的主要衰变通道。在零温度极限下，寿命被确定为520（+310）（-140）s，可以说是在实验室环境中确定的最长寿命。
We have measured the lifetime of the 5s5p 3P2 metastable state of strontium atoms by magneto-optically trapping the decayed atoms to the ground state, which allowed sensitive detection of the rare decay events. We found that the blackbody radiation-induced decay was the dominant decay channel for the state at T=300 K. The lifetime was determined to be 520(+310)(-140) s in the limit of zero temperature, arguably the longest lifetime ever determined in a laboratory environment.