摘要
基于全相对论扭曲波方法,系统研究了入射电子为1~15倍阈值能量范围,电子碰撞激发Fe25+离子1s2S1/2—2p 2P3/2,Fe24+离子1s2 1S0—1s2p 3P1,1P1和Fe23+离子1s22s2S1/2—1s2s2p(3P)4P3/2,1s2s2p(3P)2P3/2,1s2s2p(1P)2P3/2激发态精细结构能级及磁子能级的截面以及退激发辐射Kα线的极化度,并讨论了Breit相互作用的影响,以及总截面、磁子截面和X光的极化度随入射电子能量的变化规律.同时,计算结果与以往的理论及实验结果进行了比较,发现理论计算结果与实验结果具有较好的一致性.
The total and magnetic sublevel cross sections for electron impact excitations of H-like thorough Li-like iron ions are calculated systematically at electron-impact energies ranging from 1to 15threshold units by using the relativistic distorted wave method.The polarizations of released Kαhave been obtained for the 1s2S1/2—2p 2P3/2transition of Fe25+,1s2 1S0—1s2p 1,3P1transitions of Fe24+and 1s22s2S1/2— 1s2s2p(3P)4P3/2,2P3/2and 1s2s2p(1P)2P3/2transitions of Fe23+ion,respectively.It is found that Breit interaction is very important to the magnetic cross sections,which results in larger differences of the polarizations of Kαcompared with the results without considering Breit interactions,especially in the case of larger collision energies.Comparison is also made of present results with other theoretical and experiment data available in the literature,good agreement is obtained.
出处
《西北师范大学学报（自然科学版）》
CAS
北大核心
2014年第2期35-42,46,共9页
Journal of Northwest Normal University(Natural Science)
基金
国家自然科学基金资助项目(10964010
11274254
11147108
U1331122)
关键词
电子碰撞激发
相对论扭曲波理论
散射截面
极化度
electron impact excitation
relativistic distorted-wave
cross section
polarization
