To extend the research on the atomic structure of tungsten ions with an open 4-shell, we conducted an investigation into the M1 transitions originating from the ground configuration of W using the SHHtscEBIT in the 420–600 nm range. Three different calculational methods, including the relativistic configuration interactions (RCI) and the relativistic many-body perturbation theory (RMBPT) implemented in FAC, as well as the multiconfiguration Dirac-Hartree-Fock (MCDHF) in GRASP2018, are performed to investigate the energy level structure of W. The excitation energies obtained through RCI and RMBPT are in good agreement, with an average difference of 0.62 %. When comparing RCI and MCDHF, this difference increases to 1.20 %. The observed 12 lines of Ware identified using the detailed collisional-radiative model with the atomic data calculated by RCI. The average wavelength deviations from experimental results are 0.77 %, 1.38 %, and 2.02 % for RCI, RMBPT, and MCDHF, respectively.

中文翻译：

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研究 M1 从 W23+ 地面配置的转变


为了扩展对具有开放 4 壳层的钨离子原子结构的研究，我们使用 SHHtscEBIT 在 420-600 nm 范围内对源自 W 基态构型的 M1 跃迁进行了研究。采用三种不同的计算方法，包括FAC中实现的相对论构型相互作用（RCI）和相对论多体微扰理论（RMBPT），以及GRASP2018中的多构型Dirac-Hartree-Fock（MCDHF）来研究能量RCI和RMBPT得到的激发能吻合较好，平均相差0.62%。当比较 RCI 和 MCDHF 时，这种差异增加到 1.20%。使用详细的碰撞辐射模型和 RCI 计算的原子数据识别了观察到的 12 条 Ware 线。 RCI、RMBPT 和 MCDHF 与实验结果的平均波长偏差分别为 0.77%、1.38% 和 2.02%。