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

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 circle 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 circle 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. (orig.)