Influence of Breit interaction on the cross section and circular polarization of radiation emitted by longitudinally-polarized electron impact excitation of highly charged Be-like ions

29th International Conference on Photonic, Electronic, and Atomic Collisions

Chen, Zhan-Bin^1 ; Dong, Chen-Zhong^1 ; Jiang, Jun^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

关键词: Atomic numbers;    Breit interaction;    Distorted wave methods;    Incident energy;    Linear polarization;    Orders of magnitude;    Polarization of radiation;    Polarized electrons;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/5/052038/pdf
DOI  :  10.1088/1742-6596/635/5/052038

来源: IOP

【 摘 要 】

We investigated the contributions of the Breit interaction to the longitudinally-polarized electron impact excitation cross sections and circular polarizations of the 1s2s22p3/2(J = 2) → 1s22s2(J = 0) line of highly charged Be-like ions using a fully relativistic distorted-wave method. It is found that the Breit interaction can modify the Mf= -1 and -2 sublevels cross sections by several orders of magnitude. These dramatic influences also lead to a remarkable decrease in the circular polarization of radiation, which characters becomes more evident as the incident energy and/or atomic number increases. And all these features are different from the conclusions for the linear polarization of radiation.