Relativistic many-body calculations of excitation energies and transition rates from core-excited states in silverlike ions
Relativistic many-body calculations of excitation energies and transition rates from core-excited states in silverlike ions
复制标题
类银离子中激发能和核心激发态跃迁速率的相对论多体计算
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
A. Safronova
中科院分区：
文献类型：
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作者：
U. Safronova;A. Safronova
从类钯Dirac-Fock势（[Kr] 4d 10）出发，用相对论多体微扰理论（RMBPT）计算了类银离子（Z=50-100）的[Kr] 4d 94 f2，[Kr] 4d 94 f5 l和[Kr] 4d 95 l5 l ′态（l= s，p，d，f）的能量. 二阶库仑和Breit-Coulomb相互作用。修正的Breit相互作用的频率依赖性考虑在最低阶。对能量的兰姆位移校正也包括在最低阶中。内禀粒子-粒子-空穴对能量的贡献是单体和二体贡献之和的20-30%。计算了核电荷Z = 50-100的类银离子4d-4f和4d-5l电偶极跃迁的跃迁速率和谱线强度。 RMBPT包括Breit相互作用是用来评估延迟E1矩阵元素的长度和速度的形式。一阶RMBPT用于计算中间耦合系数，二阶RMBPT用于计算中间耦合系数。
Energies of [Kr]4d94f2, [Kr]4d94f5l, and [Kr]4d95l5l′ states (with l = s, p, d, f) for Ag-like ions with Z = 50–100 are evaluated to second order in relativistic many-body perturbation theory (RMBPT) starting from a Pd-like Dirac–Fock potential ([Kr]4d10). Second-order Coulomb and Breit–Coulomb interactions are included. Correction for the frequency dependence of the Breit interaction is taken into account in lowest order. The Lamb-shift correction to energies is also included in lowest order. Intrinsic particle–particle–hole contributions to energies are found to be 20–30% of the sum of the one- and two-body contributions. Transition rates and line strengths are calculated for the 4d–4f and 4d–5l electric-dipole (E1) transitions in Ag-like ions with nuclear charge Z = 50–100. RMBPT including the Breit interaction is used to evaluate retarded E1 matrix elements in length and velocity forms. First-order RMBPT is used to obtain intermediate coupling coefficients and second-order RMBPT is used to calculate t...