In this work a systematic analysis of Bi IV atomic properties is presented. Ab initio relativistic Hartree–Fock calculations in an intermediate coupling (IC) formalism and taking into account Core Polarization Effects (CPE) are used. We use for the IC calculations the standard method of least square fitting of experimental energy levels by means of computer codes from Cowan which was modified in order to include CPE. Our calculations have been made from 17 configurations of Bi IV: 5d¹⁰6s², 5d¹⁰6p², 5d¹⁰6sns ($n=$ 7–10) and 5d¹⁰6snd ($n=$ 6–9) for even parity and 5d¹⁰6snp ($n=6,7$), 5d¹⁰6snf ($n=5,6$), 5d⁹6s²6p and 5d⁹6s²nf ($n=5,6$) for odd parity. Transition probabilities and oscillator strengths for 100 lines and some radiative lifetimes of Bi IV have been calculated. Besides a comparison of our results with the scarce experimental values available in the bibliography are presented. The presence of spectral lines of bismuth in stellar atmospheres has been reported in different stars. This is the motivation by this work can be very interest in astrophysical area. Recently the Bi IV is taking importance because it is considered as the main dopant in the prospective used for the design and synthesis of new scintillators.

在这项工作中，提出了Bi IV原子性质的系统分析。在中间耦合（IC）形式主义中使用从头开始的相对论性Hartree-Fock计算，并考虑了核心极化效应（CPE）。对于IC计算，我们使用通过Cowan的计算机代码对实验能级进行最小二乘拟合的标准方法，该方法经过修改以包含CPE。图5d：我们的计算已经从毕IV的17个配置由^10个6S ²，5D ¹⁰ 6P ²，5D ¹⁰ 6sns（$ñ=$ 7–10）和5d ¹⁰ 6snd（$ñ=$ 6–9）以获得偶数奇偶校验和5d ¹⁰ 6snp（$ñ=6，7$），5d ¹⁰ 6snf（$ñ=5，6$），5d ⁹ 6s ² 6p和5d ⁹ 6s ² nf（$ñ=5，6$）以实现奇偶校验。计算了100条线的跃迁概率和振荡器强度以及Bi IV的一些辐射寿命。除了将我们的结果与参考书目中可用的稀有实验值进行比较之外，还介绍了这些内容。据报道，在恒星大气中存在铋光谱线。这是这项工作的动机可能对天体物理学领域非常感兴趣。最近，Bi IV变得越来越重要，因为它被认为是用于设计和合成新型闪烁体的准分子中的主要掺杂剂。