Ti^(21+)和Ti^(20+)离子双电子复合过程的理论研究  

Theoretical study on dielectronic recombination of highly charged Ti^(21+) and Ti^(20+) ions

作　　者：颉录有[1] 崔海月[1] 张登红[1] 蒋军[1] 董晨钟[1] 

机构地区：[1]甘肃省原子分子物理与功能材料重点实验室西北师范大学物理与电子工程学院,甘肃兰州730070

出　　处：《西北师范大学学报（自然科学版）》2016年第3期30-36,42,共8页Journal of Northwest Normal University(Natural Science)

基　　金：国家自然科学基金资助项目(U1331122;U1332206;11274254;11464042;11564036)

摘　　要：利用多组态Dirac-Fock(MCDF)方法和密度矩阵理论,系统计算了类氢Ti^(21+)(1s)和类氦Ti^(20+)(1s^2)离子KLL双电子复合过程中所有共振双激发态的能级、辐射和Auger跃迁的几率,以及双电子伴线的强度、角分布和极化度.研究了Breit相互作用对Auger几率、双电子伴线强度和辐射X射线极化度的影响.计算结果与已有文献和EBIT实验测量结果符合较好.In this work , the KLL dielectronic recombination（DR） processes and linear polarization degree of emitted X‐rays are investigated for Ti21＋ （1s ） and Ti20＋ （1s2 ） ions in the framework of multi‐configuration Dirac‐Fock（MCDF） method and the density matrix theory . The resonance energis , radiative and Aauger transition probabilities , the resonance strengths , angular distributions and linear polarization degrees for all of KLL dielectronic satellite lines are presented . In the calculations , the electron correlation effects , QED effects and Breit interactions have been well considered . Comparison is made between the present results and the EBIT experimental measurements ,a good agreement is obtained .

关 键 词：MCDF理论 密度矩阵理论 双电子复合 共振强度 极化度 

分 类 号：O562.6[理学—原子与分子物理]