Polarization of M2 line emitted from highly-charged beryllium-like ions following electron-impact excitation

28th International Conference on Photonic, Electronic and Atomic Collisions

Shi, Y.L.^1,2 ; Dong, C.Z.^2 ; Ma, X.Y.^2 ; Wu, Z.W.^2 ; Xie, L.Y.^2 ; Fritzsche, S.^3,4

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

741001, China^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^2

Helmholtz-Institut Jena, Fröbelstieg 3, Jena

D-07743, Germany^3

Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, Jena

D-07743, Germany^4

关键词: Beryllium-like ions;    Depolarization effects;    Electron-impact excitation;    Fluorescence radiations;    Incident electrons;    Isoelectronic sequence;    Linear polarization;    Magnetic quadrupoles;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/488/6/062029/pdf
DOI  :  10.1088/1742-6596/488/6/062029

来源: IOP

【 摘 要 】

The contributions of the Breit interaction to the linear polarization of the 1s2s22p3/2J=2 → 1s22s2J=0 magnetic quadrupole (M2) line following electron-impact excitation have been investigated systematically for the beryllium isoelectronic sequence with 42 ≤ Z ≤ 92. It is found that the Breit interaction depolarizes significantly the linear polarization of the M2 fluorescence radiation and that these depolarization effects increase as the incident electron energy and/or the atomic number is enlarged.