LMD — Calculation of longitudinal momentum distributions in the single ionization of helium by ion impact Original Research Article

A program is presented which calculates the final-state longitudinal momentum distributions of the ejected electron and recoil-ion for the single ionization of helium-like targets by both light and heavy-ion impact. The longitudinal momentum distributions are evaluated within a wave treatment. The continuum-distorted-wave (CDW) and continuum-distorted-wave eikonal-initial-state (CDW-EIS) approximations are used throughout. The program considered here extends a previously published program ION (D.S.F. Crothers, M. McCartney, Comput. Phys. Commun. 72 (1992) 288) which calculated the total, singly and doubly differential cross sections for the ionization of hydrogen-like targets by fully stripped projectile ions.