Electron impact ionization cross sections of highly charged open L-shell tungsten ions

被引：2
作者：
He, Zhencen [1 ]
Niu, Ben [1 ]
Xiong, Gang [1 ]
Huang, Liangyu [1 ,2 ]
Liu, Jialin [1 ]
Liu, Liang [3 ]
Hu, Zhimin [4 ]
Chen, Chongyang [1 ,2 ]
Wei, Baoren [1 ,2 ]
Zou, Yaming [1 ,2 ]
Yao, Ke [1 ,2 ]
机构：
[1] Fudan Univ, Shanghai EBIT Lab, Key Lab Nucl Phys & Ion Beam Applicat MOE, Shanghai, Peoples R China
[2] Fudan Univ, Dept Nucl Sci & Technol, Shanghai, Peoples R China
[3] Southwestern Inst Phys, Chengdu, Peoples R China
[4] Sichuan Univ, Inst Nucl Sci & Technol, Key Lab Radiat Phys, Technol Minist Educ, Chengdu, Peoples R China
来源：
PHYSICS OF PLASMAS | 2023年 / 30卷 / 04期
基金：
中国国家自然科学基金;
关键词：
RELATIVISTIC CALCULATIONS; RADIATIVE RECOMBINATION; SINGLE-IONIZATION; HYDROGENLIKE; SPECTROSCOPY; COLLISIONS; FUSION;
D O I：
10.1063/5.0142632
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
L-shell electron-impact ionization (EII) cross sections for highly charged tungsten ions were measured at incident electron energies of 29.10 and 38.92 keV using the Shanghai-EBIT. Resolved x-rays from radiative recombination (RR) processes were recorded with a high-purity Ge detector in a static electron energy scanning mode. Absolute EII cross sections were obtained by normalizing to the theoretical RR cross sections. The experimental results were compared with the calculated results using the relativistic distorted-wave method implemented in the flexible atomic code and the relativistic Lotz semi-empirical equation. The measurements showed general agreement with the calculated results by two theoretical methods for Li- to N-like W ions. The experimental uncertainties are not sufficiently small to discern the two theoretical results. Furthermore, the influence of Breit interaction on the EII cross sections of open L-shell tungsten ions was studied, and the effect is small but non-negligible. The measured EII cross sections of open L-shell tungsten ions would contribute to fusion plasma studies.
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页数：9
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