The direct and resonant single-photon photoionization of W⁶³⁺ ions from their ground state 1s ²2s ²2p ⁶3s ² S _1/2 and four lowly-excited states 1s ²2s ²2p ⁶3p ² P _1/2,3/2 and 1s ²2s ²2p ⁶3d ² D _3/2,5/2 has been studied within the framework of the relativistic R-matrix method and the multiconfigurational Dirac–Fock method. Special attention has been paid to obtaining direct and resonant ionization limits and to identifying possible resonant symmetries of W⁶³⁺ ions. To this end, the photoionization cross-sections have been calculated using the Dirac Atomic R-matrix Code package. Direct and resonant ionization limits were obtained for the ground-state photoionization of W⁶³⁺ ions, and the resonant peaks identified were found to be associated with the resonances 1s ²2s ²2p ⁵3lnl′ and 1s ²2s2p ⁶3lnl′ (l, l′ = s, p, d) for the fine-structured energy level or configuration at the level of fine structure or configuration. For excited-state photoionization, however, the resonant ionization limits and resonant peaks were hardly distinguishable due to much more densely spaced resonant peaks and a complicated resonant structure, although the respective direct ionization limits are obtained. We expect that this work will remedy the current lack of fundamental studies of the photoionization of W⁶³⁺ ions and be helpful in the diagnosis and simulation of fusion plasmas in conjunction with the available photoionization data for tungsten ions in other charge states.

W ⁶³⁺离子从基态 1 s ² 2 s ² 2 p ⁶ 3 s ² S _1/2和四个低激发态 1 s ² 2 s ² 2 p ⁶ 3 p 的直接和共振单光子光电离² P _1/2,3/2和 1 s ² 2 s ² 2 p ⁶ 3 d ² D _3/2,5/2已经在相对论 R 矩阵方法和多构型 Dirac-Fock 方法的框架内进行了研究。特别注意获得直接和共振电离极限以及识别 W ⁶³⁺离子可能的共振对称性。为此，使用 Dirac Atomic R-matrix Code 包计算了光电离截面。获得了 W ⁶³⁺离子基态光电离的直接和共振电离极限，发现识别的共振峰与共振 1 s ² 2 s ² 2 p ⁵ 3 lnl ' 和 1 s ² 2 s2 p ⁶ 3 lnl ' ( l , l ' = s , p , d ) 用于精细结构或配置级别的精细结构能级或配置。然而，对于激发态光电离，尽管获得了各自的直接电离极限，但由于更密集的共振峰和复杂的共振结构，共振电离极限和共振峰难以区分。我们预计这项工作将弥补目前缺乏 W ⁶³⁺光电离基础研究的^不足 离子并结合其他电荷态钨离子的可用光电离数据有助于聚变等离子体的诊断和模拟。