Multi-electron processes in large-angle scattering between slow Neq+ (q = 1, 2 and 3) and Ar

The charge states of the scattered and recoil ions were simultaneously measured at a large scattering angle (ΘCM = 40°) in single collisions of Ne ions with Ar atoms at an energy of 5 keV (relative velocity v = 0.10 a.u.). The incident charge (q) dependence of the charge state correlations between Ne and Ar ions are discussed for q = 1, 2 and 3. It was found that the mean charge state of Ne ions (q¯Ne) and Ar ions (q¯Ar) increased with q, while the number of emitted electrons (q¯Ne+q¯Ar-q) was independent of q.