Influence of Breit interaction on the angular distribution and polarization characteristics of the radiated photons during electron-impact excitation of beryllium-like ions
Based on the multiconfiguration Dirac-Fock(MCDF)method and the fully relativistic distorted wave method,we have calculated the electron-impact excitation cross sections from ground state to the individual magnetic sublevels and aligment parameters of the 1s2s22p3/2J=1 excited state of highy-charged beryllium-like ions(47≤Z≤92),and then obtained the angular distribution and polarization of the radiated photons of the 1s2s22p3/2J=1→1s22s2J=0 radiation transition.The influence of Breit interaction to the individual magnetic sublevels cross sections、linear polarizability and angle distribution is emphatically discussed.The results show that Breit interaction greatly changed the angular distribution and linear polarizability.
multi-configuration Dirac-Fock(MCDF)methodtwisted wave methodpolarizability and angle distribution
万方数据
维普
