Multiple electron transfer in slow Ne9+-Ne collisions

Multielectron transfer probabilities in 90-keV Ne9+-Ne collisions have been measured with respect to the projectile scattering angle θ in a range between θ=12 and 75 mrad. The projectile final charge state was determined in coincidence with the target-ion final charge state using a time-of-flight technique. For θ>45 mrad, projectile and target undergo a complete equilibration of their atomic shells (including the K shell) leading to the excitation of both collision partners and the autoionization of three electrons on average. A comparison of the measured final charge-state distributions of projectile and target with those obtained in a former experiment with the system 90-keV Ne7+-Ne [H. Schmidt-Boecking et al., Phys. Rev. A 37, 4640 (1989)] leads to the conclusion that L- and K-shell charge transfer can be treated as independent processes. Interference structure in the K-K vacancy-transfer probabilities has been observed in the final charge-state probabilities of the ''heavy-ion''--atom system