Relativistic many-body calculations of transition rates for Ca+, Sr+, and Ba+
Relativistic many-body calculations of transition rates for Ca+, Sr+, and Ba+
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DOI：
10.1103/physreva.44.1531
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发表时间：
1991-08
期刊：
影响因子：
--
通讯作者：
Guet;Johnson
中科院分区：
文献类型：
--
作者：
Guet;Johnson
用相对论多体理论计算了Ca ~+的4p→ 4s、4p→ 3d和3d→ 4s跃迁的振幅，Sr ~+的5 p → 5s、5 p → 4d和4d→ 5s跃迁的振幅，Ba ~+的6p→ 6s、6p→ 5d和5d→ 6s跃迁的振幅。的计算，这是通过三阶微扰理论进行的，给出了激发p态的寿命，与测量值一致，优于10%。的协议提高到2%的水平后，半经验修正。Sr ~+中亚稳态4d ~（3/2）和4d ~（5/2）态以及Ba ~+中亚稳态5d ~（3/2）态的寿命预测值也与测量值吻合较好，但Ba ~+中亚稳态5d ~（3/2）态的理论寿命比测量值大4倍.
Relativistic many-body theory is applied to determine amplitudes for 4p→ 4s, 4p→ 3d, and 3d→ 4s transitions in Ca+; 5p→ 5s, 5p→ 4d, and 4d→ 5s transitions in Sr+; and 6p→ 6s, 6p→ 5d, and 5d→ 6s transitions in Ba+. The calculations, which are carried out through third order in perturbation theory, give lifetimes for excited p states that agree with measured values to better than 10%. The agreement improves to the 2% level after semiempirical corrections are included. The lifetimes predicted for the metastable 4 d 3/2 and 4 d 5/2 states in Sr+ and for the 5 d 3/2 state in Ba+ also agree well with measurement, but the theoretical lifetime of the 5 d 3/2 state in Ba+ is a factor of 4 larger than the measured lifetime.