类氦Fe^(24+)离子的电子碰撞激发及辐射级联特性研究

Theoretical study on radiative cascade of Ne-like Fe^(24+) ion in electron impact excitation

基于全相对论扭曲波(RDW)电子碰撞激发计算程序REIE06,系统计算了类氦Fe^(24+)离子基态1s^(21)S_0到激发态1s2s和1s2p精细结构能级的碰撞强度和截面,分析了在不同入射电子能量下碰撞强度的变化规律,详细研究了在6.86 Ke V和9.94 Ke V能量下,碰撞辐射级联效应对类氦Fe^(24+)离子w线(1s^(21)S_0→1s2p^1P_1)、x线(1s^(21)S_0→1s2p^3P_2)、y线(1s^(21)S_0→1s2p^3P_1)和z线(1s^(21)S_0→1s2s^3S_1),x/w、y/w和z/w线强度比值的影响,总结了一些有意义的结论.部分计算结果与其它实验和理论结果进行了比较,取得了很好的一致性.

The electron impact excitation （EIE） collision strengths of He-like Fe24＋ ions form the ground state 1s^21S0 to all of excited states 1s2s and 1s2p are calculated systematically by using the fully relativistic distorted-wave program REIE06. Based on those calculations, the influence of the radiative cascade effects on the values of the x/w、y/w and z/w [w：1s^2 1S0→1s2p ^1P1,x：1s^2 1S0→1s2p ^3P2,y：1s^2 1S0→1s2p ^3P1,z：1s^2 1S0→1s2s ^3S1] line-intensity ratio are discussed systematically at two electron energies： 6.68Kev and 9.94KeV. Some important conclusions are summarized. Also, comparisons of the present calculations with the available other calculations and experimental results are made.