H + Ar collisions. I. Experimental charge-production cross sections

Absolute total cross sections for producing H⁺, Ar⁺, H^-, and e^- and the large-angle-scattering differential cross section for H⁺ production have been determined for H + Ar collisions. These determinations were made by combining experimental measurements, described here, and theoretical calculations, described in the following paper. The hydrogen-atom energy range covered extends from 3 keV down to 50 eV. An interesting structured cross section is found for the H^- + Ar⁺ ion pair formation reaction. The experimental techniques used are described and the cross sections are compared, where possible, with the data of other investigators. An interpretation of the results, based on the details of the H + Ar interaction, is suggested.