Resonant transfer and excitation: Dependence on projectile charge state and target-electron momentum distribution

Resonant transfer and excitation (RTE) involving simultaneous electron capture and projectile K-shell excitation has been measured for calcium ions in charge states ranging from neon-like to hydrogen-like incident on molecular hydrogen over an energy range 100--370 MeV. The results establish a projectile charge-state dependence for RTE and provide a detailed test of theoretical calculations. The effect of the target-electron momentum distribution on the RTE process is demonstrated by comparing with previous results for calcium ions incident on helium