ADIABATIC THEORY FOR BINARY-ENCOUNTER-ELECTRON EMISSION

The electron-impact approximation for the ejection of target electrons by heavy, highly charged projectiles is modified in order to allow fo r a distortion of the initial state by the heavy perturber. Model calc ulations for ionization of H-2 by 0.5-0.6 MeV/amu Cu5+ impact show tha t the binary-encounter peak is considerably broadened when distortion effects are included. In general, this leads to a better agreement of the peak shape with experimental data than the conventional binary-enc ounter model.