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Measurement of the annihilation decay rate of 2 3S1 positronium
EPL ( IF 1.8 ) Pub Date : 2020-11-03 , DOI: 10.1209/0295-5075/132/13001 R. E. Sheldon , T. J. Babij , B. A. Devlin-Hill , L. Gurung , D. B. Cassidy
中文翻译:
2 3 S 1的an灭衰减率的测量
更新日期:2020-11-03
EPL ( IF 1.8 ) Pub Date : 2020-11-03 , DOI: 10.1209/0295-5075/132/13001 R. E. Sheldon , T. J. Babij , B. A. Devlin-Hill , L. Gurung , D. B. Cassidy
We report a measurement of the annihilation decay rate of positronium (Ps) atoms, . Ground state atoms optically excited to radiatively metastable states were quenched via Stark mixing by the application of a time-delayed electric field. Rapid radiative decay of the Stark mixed states to the ground state, followed by self-annihilation, was observed via the annihilation radiation time spectrum, and used to determine the number of excited state atoms remaining at different times, and hence the decay rate. We obtain , in broad agreement with the Zeeman-shifted theoretical value of .
中文翻译:
2 3 S 1的an灭衰减率的测量
我们报告了对posit(Ps)原子the灭衰减率的测量。通过施加时间延迟电场,通过斯塔克混合,将光学激发成辐射亚稳态的基态原子淬灭。通过an没辐射时间谱观察到斯塔克混合态快速辐射衰变到基态,然后自self灭,并用于确定在不同时间剩余的激发态原子数,从而确定衰变率。我们得到与的塞曼位移的理论值大致一致的。