Inelastic collisions of positrons with lithium and sodium atoms

Abstract

Detailed investigations of the inelastic scattering of positrons by lithium and sodium atoms are presented. The targets are described using the Clementi-Roetti wavefunctions within the framework of the one-valence-electron model. The partial cross sections for eight values of the total angular momentum I, (corresponding to 0<or=l<or=7) are calculated at 25 values of the incident energy k12 (0.1<or=k12<or=1000 eV) using the coupled-static approximation. The resulting total elastic and positronium formation cross sections are compared with those determined by other authors.