Electron transfer in collisions between atomic ions and rare-gas atoms for primary-ion energies below 200 eV. II

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Abstract
Cross sections have been measured for electron transfer from rare-gas atoms to H+, He+, Ne+, Ar+, and Kr+, for reactant kinetic energies E0 in the center-of-mass between 0.4–120 eV, and for ground-state reactants. These cross sections appear to have thresholds. The magnitudes of the cross sections and the apparent threshold energies depend systematically on the identities of the primary ion and target atoms. These reactions appear to leave the products in excited states. The secondary ions normally pick up considerable momentum from the primary ion and are produced with a distrubition in their kinetic energy. Interesting structure is found in the cross section for Kr++Ar→Ar++⋅⋅⋅. At low E0, excited primary ions are found to yield very different cross sections than unexcited primary ions. It is suggested herein that an adequate theoretical description of these findings may require fairly accurate potential energy curves for the reactant and product systems.