The Elastic and Inelastic Scattering of Electrons and Positrons from the s-states of Atomic Hydrogen

Total elastic and inelastic cross sections, for the scattering of electrons (without exchange) and positrons (neglecting the formation of positronium) from the 1s, 2s and 3s states of atomic hydrogen, have been calculated in three approximations using the method of partial waves. All significant partial wave contributions to the cross sections have been included. The results indicate that `s-state' distortion effects are negligible at incident energies greater than 30 ev.