Differential scattering cross sections for collisions of alkali ions and atoms. II

Relative differential cross sections, for both direct and charge exchange scattering have been obtained for the Li+ + K, Na+ + K and K+ + Na alkali ion-atom collisions, over the energy range 200-1200 eV and for scattering angles 0-6 mrad (in one case 0-15 mrad). The experimental results are compared to semiclassical calculations, based upon recent potential energy curves. The charge exchange probabilities are calculated by solving the time dependent Schroedinger equation in a two-state approximation. In the Li+ + K experiment diffraction effects are observed, which can be compared to the Fraunhofer diffraction of an annular diaphragm. (Auth.)