Abstract
Absolute differential cross sections for the production of electrons by collisions of neon ions with a neon-gas target and argon ions with an argon-gas target were measured. The cross sections were doubly differential in angle and energy of the ejected electrons. The energy range of the primary ions was 50 to 300 keV. Electrons that were produced by the ion-atom collisions were analyzed in angle and energy, counted, and, from a knowledge of the other parameters of the apparatus, an absolute cross section was determined. The experimental results show some structure in the electron-energy spectra superimposed on a continuous background. This is consistent with the predictions of the Fano-Lichten electron-promotion model. Calculations based on the results of the Russek statistical model are compared with experiment.