Differential scattering cross sections for collisions of alkali ions and atoms. II. Electronic excitation via rotational coupling in LiK+ and NaK+

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 Schrödinger 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.