类氖和类钠钨离子LMM双电子复合过程的研究  

Theoretical study of LMM dielectronic recombination of Ne-like and Na-like tungsten ions

作　　者：颉录有 满倩倩 张登红 蒋军 XIE Lu-you;MAN Qian-qian;ZHANG Deng-hong;JIANG Jun(Key Laboratory of Atomic and Molecular Physics ＆ Functional Materials of Gansu Province,College of Physics and Electronic Engineering,Northwest Normal University,Lanzhou 730070,Gansu,China)

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

出　　处：《西北师范大学学报（自然科学版）》2018年第4期26-33,共8页Journal of Northwest Normal University(Natural Science)

基　　金：国家重点研发计划资助项目(2017YFA0402300);国家自然科学基金资助项目(U1530142;11564036;11774292;11464042);西北师范大学青年教师科研能力提升计划资助项目(NWNU-LKQN-15-3)

摘　　要：基于相对论组态相互作用理论方法,系统研究了类氖和类钠钨离子的LMM双电子复合过程(DR).考虑了电子关联效应、Breit相互作用、QED等效应,计算给出了LMM-DR过程相关的W63+,W62+离子单、双激发态的能级和相关的辐射、Auger几率,以及DR过程的强度和截面.基于理论计算,对Tokyo-EBIT实验测得的1.0~5.0keV能区的X射线谱进行了模拟和分析,理论计算很好地模拟并标识出了实验谱中来自W64+和W63+离子的共振峰.In this article,ab initio calculations have been performed for the LMM dielectronic recombination （DR） strengths of Ne-like and Na-like tungsten ions in the ground state 2s 22p 6（ 1S 0） and 2s 22p 63s（ 2S 1/2 ） ,respectively.The energy levels,radiative transition rates and Auger rates are calculated using the Flexible Atomic Code based on relativistic configuration interaction approach for all of doubly excited states of W 63＋ and W 62＋ ions related with the LMM-DR process.In the calculations,electronic correlations,Breit interactions,and QED effects on energy levels are well considered.The calculated energies are compared with the experimental values from the NIST and EBIT measurements,and other calculations where available,excellent agreement has been obtained.The DR cross sections are presented by convoluting the resonance strength with a 50 eV wide（FWHM） Gaussian distribution as the same as the EBIT beam energy resolution,and compared with the experimental results.The theoretical results are in good consistent with the EBIT experimental measurements,and important resonance peaks are clearly identified.

关 键 词：相对论组态相互作用理论 双电子复合过程 共振强度 截面 

分 类 号：O562.5[理学—原子与分子物理]