A general program to calculate atomic continuum processes using the NIEM method

Abstract This paper describes a set of computer program packages NIEM which enable electron-atom and electron-ion collision cross sections to be calculated for a general atomic system described by LS-coupling. The calculations are based on a non-iterative integral equation method. Title of program: NIEM POTC1 Catalogue Id: AAJG_v1_0 Nature of problem This program calculates all the interaction potentials involving the bound and continuum electrons necessary to enable electron atom or electron ion scattering to be calculated for a general atomic system. The bound orbitals are specified analytically. Direct potentials, the coefficients in the asymptotic expansion of the potentials, exchange coefficients, and correlation potentials are stored on a permanent tape or disc file for use by NIEM NIES2. Versions of this program held in the CPC repository in Mendeley Data AAJG_v1_0; NIEM POTC1; 10.1016/0010-4655(81)90002-3 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)摘要 本文介绍了一套名为NIEM的计算机程序包，其可针对采用LS耦合（LS-coupling）描述的一般原子系统，计算电子-原子与电子-离子碰撞截面。该计算基于非迭代积分方程法。 程序名称：NIEM POTC1 目录号：AAJG_v1_0 问题特性 本程序可计算一般原子系统中开展电子-原子或电子-离子散射所需的全部涉及束缚电子与连续态电子的相互作用势。束缚轨道以解析形式给出。直接势、势的渐近展开系数、交换系数以及关联势将被存储至永久磁带或磁盘文件，供NIEM NIES2调用。 Mendeley数据中的CPC程序库收录的本程序版本为：AAJG_v1_0；NIEM POTC1；10.1016/0010-4655(81)90002-3 本程序源自贝尔法斯特女王大学馆藏的CPC程序库（1969-2019）