Breit相互作用对类铍离子电子碰撞激发过程辐射光子角分布和极化特性的影响  

Influence of Breit interaction on the angular distribution and polarization characteristics of the radiated photons during electron-impact excitation of beryllium-like ions

作　　者：王金霞 杨慧慧 龙林 WANG Jin-xia;YANG Hui-hui;LONG Lin(Public Basic Teaching Departmengt,Chongqing College of Mobile Communication,Chongqing 404000,China;Faculty of Science,Xi'an Aeronautical University,Xi'an 710077,Shaanxi,China)

机构地区：[1]重庆移通学院公共基础教学部,重庆404000 [2]西安航空学院理学院,陕西西安710077

出　　处：《西北师范大学学报(自然科学版)》2025年第1期45-50,I0003,共7页Journal of Northwest Normal University(Natural Science)

基　　金：陕西省科技厅基础研究计划资助项目(2023-JC-QN-0085);陕西省教育厅专项科研计划资助项目(22JK0423)。

摘　　要：采用全相对论扭曲波和多组态Dirac-Fock(MCDF)方法,理论计算了高电荷态类铍离子(47≤Z≤92)在电子碰撞激发过程中,电子从基态激发到激发态1s2s^(2)2p_(3/2)J=1的取向参数和该激发态的各磁子能级截面,进而得到了辐射跃迁1s2s^(2)2p_(3/2)J=1→1s^(2)2s^(2)J=0过程中辐射光子的极化度和角分布,同时讨论了Breit相互作用对磁子能级碰撞激发截面、线性极化度和角分布的影响,发现Breit相互作用对磁子能级碰撞激发截面有重要的影响,进而导致随后退激辐射谱线极化度和角分布的显著变化.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 1s2s^(2)2p_(3/2)J=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 1s2s^(2)2p_(3)/2 J=1→1s^(2)2s^(2)J=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.

关 键 词：多组态DIRAC-FOCK方法 扭曲波方法 角分布和极化度 

分 类 号：O562.4[理学—原子与分子物理]