Excited States Created in Charge Transfer Collisions Between Atoms and Highly Charged Ions

A survey of theoretical achievements and problems in the study of the formation of excited states in atom-highly charged ion charge-exchange collisions is presented. Both one- and many-electron colliding systems are considered. Apart from the basic single electron transfer reaction, other multi-electron transition processes leading to creation of excited product states are also discussed. The theoretical data on the final state distributions of captured electrons are critically analyzed and problems which require further investigations are emphasized.