Electron-impact ionization cross section calculations for lithium-like ions
Guo-Jie Bian(卞国杰)1, Jyh-Ching Chang(张稚卿)2, Ke-Ning Huang(黄克宁)3, Chen-Sheng Wu(武晨晟)1,†, Yong-Jun Cheng(程勇军)4, Kai Wang(王凯)5, and Yong Wu(吴勇)1,6
1 National Key Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100088, China; 2 Department of Physics, National Tsing Hua University, Hsinchu 300, China; 3 Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China; 4 School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710119, China; 5 Hebei Key Laboratory of Optic-electronic Information and Materials, The College of Physics Science and Technology, Hebei University, Baoding 071002, China; 6 HEDPS, Center for Applied Physics and Technology, and College of Engineering, Peking University, Beijing 100871, China
Abstract The electron-impact ionization of lithium-like ions C3+, N4+, O5+, Ne7+, and Fe23+ is studied using a combination of two-potential distorted-wave and R-matrix methods with a relativistic correction. Total cross sections are computed for incident energies from 1 to 10 times of ionization energy and better agreements with the experimental results are obtained in comparison with the theoretical data available. It is found that the indirect ionization processes become significant for the incident energy larger than about four times of the ionization energy. Contributions from the exchange effects along the isoelectronic sequence are also discussed and found to be important. The present method can be used to obtain systematic ionization cross sections for highly charged ions across a wide incident energy range.
Fund: This work is supported by the National Natural Science Foundation of China (Grant Nos. 11934004 and U1832201), the Science Challenge Project (Grant No. TZ2016005), and the CAEP Foundation (Grant No. CX2019022).
Guo-Jie Bian(卞国杰), Jyh-Ching Chang(张稚卿), Ke-Ning Huang(黄克宁), Chen-Sheng Wu(武晨晟), Yong-Jun Cheng(程勇军), Kai Wang(王凯), and Yong Wu(吴勇) Electron-impact ionization cross section calculations for lithium-like ions 2022 Chin. Phys. B 31 013401
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