Third-order relativistic many-body calculations of energies, transition rates, hyperfine constants, and blackbody radiation shift in 171Yb+
Third-order relativistic many-body calculations of energies, transition rates, hyperfine constants, and blackbody radiation shift in 171Yb+
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171Yb 中能量、跃迁速率、超精细常数和黑体辐射位移的三阶相对论多体计算
DOI：
10.1103/physreva.79.022512
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发表时间：
2009
影响因子：
2.9
通讯作者：
M. Safronova
中科院分区：
文献类型：
--
作者：
U. Safronova;M. Safronova
用相对论多体微扰理论研究了单电离Yb+离子的性质。具体地说，Xe 4fns1/2、Xe 4fnpj和Xe 4fndj n 9的能量通过三级计算。确定了包括6s、7s、8s、6p、7p、5d和6d态的电偶极跃迁的约化矩阵元、振子强度和跃迁速率。确定了6p态的寿命值。计算了电偶极子6s1/2−nPj，n=6-12个矩阵元，得到了基态E_1极化率。测定了YbⅡ低能级至n=7的超精细A值，研究了二次斯塔克效应对YbⅡ基态超精细结构能级的影响。计算得到F=1，M=0，↔F=0，M=0跃迁的位移为−0.1796 Hz/kV/cm2，与−0.171 0.009的理论结果一致。这些计算为与实验和理论进行比较提供了理论基准。
Relativistic many-body perturbation theory is applied to studying the properties of singly ionized ytterbium, Yb+. Specifically, energies of the Xe 4fns1/2, Xe 4fnpj, and Xe 4fndj n 9 are calculated through third order. Reduced matrix elements, oscillator strengths, and transition rates are determined for electricdipole transitions including the 6s, 7s, 8s, 6p, 7p, 5d, and 6d states. Lifetime values are determined for the 6p states. Electric-dipole 6s1/2−npj , n=6–12 matrix elements are calculated to obtain the ground-state E1 polarizability. The hyperfine A values are determined for the low-lying levels up to n=7 of Yb II. The quadratic Stark effect on hyperfine structure levels of Yb II ground state is investigated. The calculated shift for the F=1, M =0 ↔ F=0, M =0 transition is −0.1796 Hz / kV /cm 2, in agreement with the previous theoretical result −0.171 0.009. These calculations provide a theoretical benchmark for comparison with experiment and theory.