Theoretical study of inner-shell electron-impact excitation of highly charged ions: Alignment and angular distribution of electron emission

28th International Conference on Photonic, Electronic and Atomic Collisions

Shi, Y.L.^1,2 ; Dong, C.Z.^1 ; Ma, X.Y.^1 ; Wu, Z.W.^1 ; Xie, L.Y.^1

Key Laboratory of Atomic and Molecular Physics and Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou

730070, China^1

College of Physics and Information Science, Tianshui Normal University, Tianshui

741001, China^2

关键词: Beryllium-like ions;    Electron angular distribution;    Electron-impact excitation;    Highly charged ions;    Incident electrons;    Inner-shell electrons;    Magnetic sublevels;    Relativistic correction;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/488/6/062020/pdf
DOI  :  10.1088/1742-6596/488/6/062020

来源: IOP

【 摘 要 】

The influence of the Breit interaction, typically appears as a relativistic correction to the Coulomb repulsion acting among the electrons, on the alignment (i.e. the population of the magnetic sublevels) and the angular distribution of electron emission from the excited state have been investigated systematically. Detailed calculations have been carried out for the electron-impact excitation cross sections from the ground state to the individual magnetic sublevels of highly charged beryllium-like ions by using a fully relativistic distorted-wave (RDW) method. A remarkable change in the alignment and the electron angular distribution due to the Breit interaction is found, especially for the cases with high-energetic incident electron and high-Z target ions.