Using the multiconfiguration Dirac–Fock method, calculations for the lowest 62 levels of the ([Ar] 3d¹⁰)4s²4p⁵, ([Ar] 3d¹⁰)4s²4p³4d², ([Ar] 3d¹⁰)4s²4p⁴4d, ([Ar] 3d¹⁰)4s4p⁶, and ([Ar] 3d¹⁰)4s4p⁵4d configurations are performed for the bromine isoelectronic sequence La XXIII-Dy XXXII, W XL. Results of energy levels, lifetimes, wavelengths, and electric dipole, magnetic dipole, electric quadrupole, and magnetic quadrupole radiative rates are presented. In order to assess the accuracy of results, independent calculations for W XL have been carried out using the many-body perturbation theory (MBPT) method. Comparisons are made with available theoretical results from other calculations and the observed values of the Atomic Spectra Database of the National Institute of Standards and Technology. Energy levels are estimated to be accurate to better than 1%, and radiative rates (and lifetimes) are accurate to better than 20% for a majority of strong transitions. These results should be useful in many applications of lanthanide ions related to broad area of research such as applied physics, laser physics and fusion science.

使用多配置Dirac-Fock方法，计算（[Ar] 3d ¹⁰）4s ² 4p ⁵，（[[Ar] 3d ¹⁰）4s ² 4p ³ 4d ²，（[Ar] 3d ¹⁰）4s ² 4p ⁴ 4d，（[[Ar] 3d ¹⁰）4s4p ⁶和（[Ar] 3d ¹⁰）4s4p ⁵对溴等电子序列La XXIII-Dy XXXII，W XL进行4d配置。给出了能级，寿命，波长以及电偶极子，磁偶极子，电四极子和磁四极子辐射率的结果。为了评估结果的准确性，已使用多体摄动理论（MBPT）方法对W XL进行了独立计算。使用其他计算的可用理论结果和美国国家标准技术研究院原子光谱数据库的观测值进行比较。对于大多数强跃迁，能量水平估计精确到优于1％，辐射率（和寿命）精确到优于20％。