摘要
Detailed calculations are carried out for the electron-impact excitation cross sections from the ground state to the individual magnetic sublevels of the 1s2s^(2)2p^(3)/2 J=2 excited state of highly-charged beryllium-like ions by using a fully relativistic distorted-wave(RDW)method.The contributions of the Breit interaction to the linear polarization of the 1s2s^(2)2p^(3)/2 J=2→1s22s2 J=0 magnetic quadrupole(M2)line are 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.
作者
SHI Ying-Long
DONG Chen-Zhong
MA Xiao-Yun
WU Zhong-Wen
XIE Lu-You
FRITZSCHE Stephan
师应龙;董晨钟;马小云;武中文;颉录有;FRITZSCHE Stephan(Key Laboratory of Atomic and Molecular Physics&Functional Materials of Gansu Province,College of Physics and Electronic Engineering,Northwest Normal University,Lanzhou 730070;College of Physics and Information Science,Tianshui Normal University,Tianshui 741001;Helmholtz-Institut Jena,Froelstieg 3,Jena D-07743,Germany and Theoretisch-Physikalisches Institut,Friedrich-Schiller-Universitat Jena,Max-Wien-Platz 1,Jena D-07743,Germany)
基金
Supported by the National Natural Science Foundation of China under Grant Nos 11274254,91126007 and 11264033.
