Abstract
SynopsisDetailed calculations using a fully relativistic distorted-wave method are carried out for the electron-impact excitation cross sections from the ground state 1s2 (J= 0) to the individual magnetic sublevels of the excited state 1s2s1/2 (J= 1) of highly charged He-like Fe24+ ions. The cascades effects to the cross sections and the linear polarizations of the 1s2s1/2(J= 1) → 1s2 (J=0) line are investigated systematically. Our results show that the 1s2p, 1s3l, and 1s4l (l = s, p, d) excited states have significant effects and make the cross sections increase. These influences also lead to a remarkable decrease in the linear polarization of subsequent x-ray radiation. The present results agree with the previous theoretical results and the polarization measurements very well.
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