Relativistic calculations of fine-structure energy levels of He-like Ar in dense plasmas

doi:10.1088/1674-1056/27/7/073101

中国物理B ›› 2018, Vol. 27 ›› Issue (7): 73101-073101.doi: 10.1088/1674-1056/27/7/073101

• ATOMIC AND MOLECULAR PHYSICS • 上一篇下一篇

Relativistic calculations of fine-structure energy levels of He-like Ar in dense plasmas

Xiang-Fu Li(李向富), Gang Jiang(蒋刚)

1 Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China;
2 College of Electrical Engineering, Longdong University, Qingyang 745000, China;
3 Key Laboratory of High Energy Density Physics and Technology, Ministry of Education, Chengdu 610065, China

收稿日期:2018-05-26 出版日期:2018-07-05 发布日期:2018-07-05
通讯作者: Gang Jiang E-mail:gjiang@scu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11474208) and the Doctoral Science Foundation of Longdong University, China (Grant No. XYBY1704).

Relativistic calculations of fine-structure energy levels of He-like Ar in dense plasmas

Xiang-Fu Li(李向富)^1,2, Gang Jiang(蒋刚)^1,3

1 Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China;
2 College of Electrical Engineering, Longdong University, Qingyang 745000, China;
3 Key Laboratory of High Energy Density Physics and Technology, Ministry of Education, Chengdu 610065, China

Received:2018-05-26 Online:2018-07-05 Published:2018-07-05
Contact: Gang Jiang E-mail:gjiang@scu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11474208) and the Doctoral Science Foundation of Longdong University, China (Grant No. XYBY1704).

摘要/Abstract

摘要： The fine-structure energy levels of 1s2s and 1s2p atomic states for the He-like Ar ion immersed in dense plasmas are calculated. The ion sphere model is used to describe the plasma screening effect on the tested ion. The influences of the hard sphere confinement and plasma screening on the fine-structure energy levels are investigated respectively. The calculated results show that the confined effect of the hard sphere on the fine-structure energy levels increases with decreasing hard sphere radius, and the plasma screening effect on the fine-structure energy levels increases with the increase of free electron density. In dense plasmas, the confined effect of the hard sphere on the fine-structure energy levels can be neglected generally, compared with the contribution from free electron screening. An interesting phenomenon about the energy level crossing is found among 1s2s (¹S₀) and 1s2p (³P_0,1) atomic states. The results reported at the present work are useful for plasma diagnostics.

关键词: He-like Ar, fine-structure energy levels, hard sphere confinement, free electron screening

Abstract: The fine-structure energy levels of 1s2s and 1s2p atomic states for the He-like Ar ion immersed in dense plasmas are calculated. The ion sphere model is used to describe the plasma screening effect on the tested ion. The influences of the hard sphere confinement and plasma screening on the fine-structure energy levels are investigated respectively. The calculated results show that the confined effect of the hard sphere on the fine-structure energy levels increases with decreasing hard sphere radius, and the plasma screening effect on the fine-structure energy levels increases with the increase of free electron density. In dense plasmas, the confined effect of the hard sphere on the fine-structure energy levels can be neglected generally, compared with the contribution from free electron screening. An interesting phenomenon about the energy level crossing is found among 1s2s (¹S₀) and 1s2p (³P_0,1) atomic states. The results reported at the present work are useful for plasma diagnostics.

Key words: fine-structure energy levels, hard sphere confinement, free electron screening, He-like Ar

中图分类号: (High-precision calculations for few-electron (or few-body) atomic systems)

31.15.ac

31.15.ag (Excitation energies and lifetimes; oscillator strengths) 31.15.xr (Self-consistent-field methods) 52.27.Gr (Strongly-coupled plasmas)

李向富, 蒋刚. Relativistic calculations of fine-structure energy levels of He-like Ar in dense plasmas[J]. 中国物理B, 2018, 27(7): 73101-073101.

Xiang-Fu Li(李向富), Gang Jiang(蒋刚). Relativistic calculations of fine-structure energy levels of He-like Ar in dense plasmas[J]. Chin. Phys. B, 2018, 27(7): 73101-073101.

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Relativistic calculations of fine-structure energy levels of He-like Ar in dense plasmas

Relativistic calculations of fine-structure energy levels of He-like Ar in dense plasmas

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