Excitation in rare gas ion-atom collisions in the energy range 100-400 keV

Absolute cross sections for the emission of some of the more intense lines induced in various rare gas ion-atom impacts have been determined in the spectral range 3900-6000 Å by the analysis of radiation (assumed isotropic) emitted under single-collision conditions. In most cases it is found that the principal emision lines are associated with the singly ionized states of the incident and target particles. Probable excitation mechanisms are discussed with reference to relevant charge-rearrangement collision cross sections.