Distorted wave theories for dressed-ion–atom collisions with GSZ projectile potentials

Abstract

The continuum distorted wave and the continuum distorted wave-eikonal initial state approximations for electron emission in ion–atom collisions are generalized to the case of dressed projectiles. The interaction between the dressed projectile and the active electron is represented by the analytic Green–Sellin–Zachor (GSZ) potential. Doubly differential cross sections as a function of the emitted electron energy and angle are computed. The region of the binary encounter peak is analysed in detail. Interference structures appear in agreement with the experimental data and are interpreted as arising from the coherent interference between short- and long-range scattering amplitudes.