# A program for ion-atom collisions involving one electron

## Description

Abstract A program to compute transition amplitudes in the rectilinear-path impact-parameter formulation, for collision processes in which one of the colliding systems is a hydrogen atom or a hydrogenic ion and the other is a bare nucleus, is described. The time-dependent wave function is expressed in orthogonal polynomials in coordinates that, for any given value of the time, are linear functions of the distances of the electron from the two nuclei. Two different methods are used for obtaining approx... Title of program: PHCOLL Catalogue Id: ACPG_v1_0 Nature of problem Computation of transition amplitudes for ion-atom collisions in the impact-parameter formulation [2]. Versions of this program held in the CPC repository in Mendeley Data ACPG_v1_0; PHCOLL; 10.1016/0010-4655(93)90186-G This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)