Abstract We present relativistic multi-configuration Dirac-Fock calculations for the energies and oscillator strengths of He-like Al11+ ion within a dense plasma. The average-atom ion-sphere potential and the uniform electron gas model potential are used to represent the interaction between the charge particles. Self-consistent calculations of dense plasma effects on the atomic structure, based on the above two potentials, are also carried out using EPPP package，based on the Flexible Atomic Code for comparison purposes. While we find consistency between our two kinds of theoretical predictions, a discrepancy persists with the calculations of Li and Rosmej [Europhys. Lett. 99, 33001 (2012)]. We also present the line shifts of 1s2p → 1s2 transition to compare with the recent measurements of Stillman et al. [Phys. Rev. E 95, 063204 (2017)]. Agreement between theory and experiment is far from perfect, the experimental values are generally 2.2 times higher than our predictions. A qualitative analysis of the physical reasons for such differences is given. Further precise measurements and systematic elaborate calculations are needed to support spectral analysis.

中文翻译：

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致密等离子体中类氦Al11+离子线位移和振子强度的理论研究

摘要 我们提出了在致密等离子体中类氦 Al11+ 离子的能量和振子强度的相对论多配置 Dirac-Fock 计算。平均原子离子球电势和均匀电子气模型电势用于表示带电粒子之间的相互作用。稠密等离子体对原子结构的影响的自洽计算也是基于上述两种势，使用 EPPP 包进行的，基于灵活的原子代码，以进行比较。虽然我们发现两种理论预测之间存在一致性，但 Li 和 Rosmej [Europhys. 莱特。99, 33001 (2012)]。我们还展示了 1s2p → 1s2 转换的线位移，以与 Stillman 等人最近的测量结果进行比较。[物理。修订版 E 95, 063204 (2017)]。理论与实验的一致性还很不完善，实验值一般比我们的预测高2.2倍。给出了这种差异的物理原因的定性分析。需要进一步精确的测量和系统的精细计算来支持光谱分析。