Abstract
In experiments on violent ion-molecule collisions, we have observed that if the target molecule contains the lower-Z atomic-collision partner, as in e.g., Ne+ N2, NH3, the molecular nature of the target has no effect on the probability of producing K vacancies. If, on the contrary, the target molecule contains the higher-Z atomic-collision partner, as in, e.g., C+ N2, NH3, an appreciable molecular effect is evident.