IONIS: Approximate atomic photoionization intensities

Abstract A program to compute relative atomic photoionization cross sections is presented. The code applies the output of the multiconfiguration Dirac–Fock method for atoms in the single active electron scheme, by computing the overlap of the bound electron states in the initial and final states. The contribution from the single-particle ionization matrix elements is assumed to be the same for each final state. This method gives rather accurate relative ionization probabilities provided the single-ele... Title of program: IONIS Catalogue Id: AEKK_v1_0 Nature of problem Photoionization intensities for atoms. Versions of this program held in the CPC repository in Mendeley Data AEKK_v1_0; IONIS; 10.1016/j.cpc.2011.09.011 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)

**摘要** 本文提出一款用于计算原子相对光电离截面的程序。该程序采用单活性电子（single active electron）方案下原子的多组态狄拉克-福克（multiconfiguration Dirac–Fock）方法的输出结果，通过计算初态与末态中束缚电子态的重叠积分完成计算。研究假设单粒子电离矩阵元对各末态的贡献一致，在满足单电子[原文截断为single-ele...]的前提下，该方法可给出精度较高的相对电离概率。
**程序名称**：IONIS
**目录编号**：AEKK_v1_0
**问题本质**：原子的光电离强度。
**Mendeley数据中CPC程序库收录的该程序版本**：AEKK_v1_0；IONIS；10.1016/j.cpc.2011.09.011
**程序来源**：本程序源自贝尔法斯特女王大学维护的CPC程序库（1969-2018年）。