K- and L-shell resonant transfer and excitation in ion-atom collisions

Recent experimental studies of resonant transfer and excitation (RTE) in ion-atom collisions are reviewed. In the RTE process correlated electron capture and projectile excitation occur together in a single encounter with a target atom. Measurements of Caq+ + H2 (q=10-19) from 100 to 370 MeV establish the projectile charge-state dependence of K-shell RTE and provide a detailed collision system. A comparison of the Ca17+ + H2 data with previous results for Ca17+ + He demonstrates the effect of the target-electron momentum distribution on the RTE process. Studies of 230-610 MeV Nb31+ + H2 provide information about RTE involing projectile L-shell excitation. All the measurements are in reasonable agreement wit theoretical calculations. (orig.)