Transition parameters of Li-like ions (Z = 7 – 11) in dense plasmas

• Published in: Chinese physics B 2021-05, Vol.30 (5), p.53102-379
• Main Authors: Li, Xiang-Fu, Jia, Li-Ping, Wang, Hong-Bin, Jiang, Gang
• Format: Article
• Language: English
• ISSN: 1674-1056
• DOI: 10.1088/1674-1056/abea80

The energy levels, transition energies, transition probabilities, weighted oscillator strengths, and line strengths of Li-like ions ( Z = 7–11) in dense plasmas are investigated in this work. The relativistic effects and electron correlation effects are described by the MCDHF method. The ion sphere model is applied to include the dense plasma screening effect. The ground configuration 1s 2 2s and the excited 1s 2 2p, 1s 2 3 l ( l = 0–2) are considered. The configuration sets are enlarged until n = 7 where the calculated energy levels have converged. The critical free electron densities of 1s 2 3d states are estimated. Except for 1s 2 3s–1s 2 3p transitions, the transition energies for Δ n = 0 increase, and for Δ n ≠ 0 decrease with increasing free electron densities. For 1s 2 3s–1s 2 3p transitions, the spectra show blue-shift at lower free electron densities and red-shift at higher free electron densities, and the energy level crossing phenomens are observed at higher free electron densities.