Zero-degree binary encounter electron production in 30 MeV bare O8+ in collisions with H2, He, Ne, Ar, Kr and Xe

Abstract

Double differential cross-sections for the production of binary encounter electrons were measured for collisions of 30 MeV bare O8+ projectiles with H2, He, Ne, Ar, Kr and Xe targets at an electron ejection angle of θ = 0° with respect to the beam direction. Results were analyzed in terms of the impulse approximation (IA), in which target electrons in the projectile frame undergo 180° Rutherford scattering in the field of the bare projectile ion. Excellent agreement with the data was found for the H2 and He targets, while for the multi-electron targets good agreement was established only when target electrons whose velocities were lower than the projectile velocity were included in the calculation.