ERCS24: An updated version of the ERCS08 program for calculations of the cross sections for atomic electron removal based on the ECPSSR theory and its variants

ERCS24, an updated version of the ERCS08 program, calculates the atomic electron removal cross sections. It is written in FORTRAN in order to make it more portable and easier to customize by a large community of physicists, but it also comes with a separate windows graphics user interface control application ERCS24w that makes it easy to quickly prepare the input file, run the program, as well as view and analyze the output. The calculations are based on the ECPSSR theory for direct (Coulomb) ionization and non-radiative electron capture. With versatility in mind, the program allows for selective inclusion or exclusion of individual contributions to the cross sections from effects such as projectile energy loss, Coulomb deflection of the projectile, perturbation of electron's stationary state (polarization and binding), as well as relativity. This makes it straightforward to assess the importance of each effect in a given collision regime. The control application also makes it easy to setup for calculations in inverse kinematics (i.e. ionization of projectile ions by target atoms or ions).

The previous version of this program may be found at https://doi.org/0.1016/j.cpc.2008.12.034.

ERCS24，作为ERCS08程序的更新版本，计算原子电子移除截面。该程序采用FORTRAN语言编写，旨在提高其可移植性并便于广大物理学家进行定制，同时附带独立的Windows图形用户界面控制应用ERCS24w，该应用能够简化输入文件的准备、程序的运行以及输出结果的查看与分析。计算基于ECPSSR理论，针对直接（库仑）电离和非辐射电子捕获。考虑到通用性，该程序允许用户选择性地包含或排除单个贡献项，如入射粒子能量损失、入射粒子库仑偏转、电子定态扰动（极化和结合能）以及相对论效应，从而在特定的碰撞区域内直接评估每种效应的重要性。控制应用还简化了逆动力学计算（即入射离子被靶原子或离子电离）的设置。关于该程序的先前版本，可参考：https://doi.org/0.1016/j.cpc.2008.12.034。