摘要
Debye-screening effects on the electron-impact excitation(EIE)processes for the dipole-allowed transition 1 s_(2)^(1)S→1 s2 p^(1)P in He-like Al^(11+)and Fe^(24+)ions are investigated using the fully relativistic distorted-wave methods with the Debye-Huckel(DH)model potential.Debye-screening effects on the continuum-bound(CB)interaction and target ion are discussed,both of which result in reduction of EIE cross sections.This reduction due to screening on the CB interaction is dominant.The non-spherical and spherical DH potentials are adopted for considering the screening effect on the CB interaction.It is found that the spherical DH potential could significantly overestimate the influence of plasma screening on EIE cross sections for multielectron He-like ions.
作者
马玉龙
刘玲
颉录有
吴勇
张登红
董晨钟
屈一至
王建国
Yu-Long Ma;Ling Liu;Lu-You Xie;Yong Wu;Deng-Hong Zhang;Chen-Zhong Dong;Yi-Zhi Qu;Jian-Guo Wang(College of Physics and Electronic Engineering,Northwest Normal University,Lanzhou 730070,China;Key Laboratory of Computational Physics,Institute of Applied Physics and Computational Mathematics,Beijing 100088,China;Center for Applied Physics and Technology,Peking University,Beijing 100084,China;School of Optoelectronics,University of Chinese Academy of Sciences,Beijing 100049,China)
基金
Project supported by the Science Challenge Project(Grant No.TZ2016001)
the National Key Research and Development Program of China(Grants Nos.2017YFA0403200 and 2017YFA0402300)
the Funds for Innovative Fundamental Research Group Project of Gansu Province,China(Grant No.20JR5RA541)
the National Natural Science Foundation of China(Grants Nos.11774037 and 12064041)。
