[en] Ionization probabilities per electron for the L-shell and separately for the 2s and 2p subshells of reon in the 5.5 MeV/u Ne3+, Ne10+, and Ar6+-Ne collisions were determined. Significant differences between the vacancy production and ionization probabilities in the L-shell have been found indicating the nonnegligibility of excitations to higher shells in these processes