中文摘要：

利用基于相对论R矩阵理论的DARC程序系统计算了Ni 25＋离子基态1s22s（2S1/2）和激发态1s22p（2P1/2,2P3/2）的光电离截面,并通过细致平衡原理获得了统一的光复合过程（即辐射复合和双电子复合）态分辨的截面,计算结果给出了辐射复合与双电子复合过程间的干涉效应.为了标识和分析KLL共振能区所有的共振峰,基于相对论组态相互作用理论（RCI）的FAC程序被用来计算共振峰的能量、强度及其相关的双激发态的辐射、俄歇跃迁几率以及共振宽度等.利用统一的光复合截面进一步得到了KLL双电子复合过程的伴线强度,并与孤立共振近似下FAC的计算结果以及以前的理论和实验结果进行了比较,对存在的一致性和偏差进行了分析和讨论.

英文摘要：

In this study,photoionization cross sections are calculated for the ground level 1s22s（2S1/2）and the excited levels 1s22p（2P1/2,2P3/2）of Ni^26＋ ion using the Dirac atomic R-matrix codes（DARC）based on the relativistic R-matrix method.The unified level-specific photorecombination（i.e.radiative recombination and dielectronic recombination）cross sections of the ground state Ni 26＋（1s2）iron are obtained through the detailed balance principle.Detailed calculations exhibit interference effects in resonance profiles.To identify and analyze the locations and strengths for all resonant peaks,detailed calculations are performed for all known KLL resonant states by use the Flexible atomic code（FAC）based on the relativity configuration interaction（RCI）method,the resonant energies and strengths together with radiative and Auger transition rates,and the resonant width are listed.The obtained dielectronic satellite energies and strengths from DARC and FAC calculations are compared with earlier theoretic and experimental works and significant differences and similarities are discussed.