The Elastic Scattering and Neutralization of Low Velocity Hydrogen Ions in Ethylene and Propylene

Abstract

The low velocity scattering of H⁺, H₂⁺, and H₃⁺ in both ethylene and propylene has been measured at ion velocities of less than 150 volts. Both elastic scattering and neutralization have been obtained over a velocity range. An effect of gas pressure at constant voltage on the total scattering was experienced. This is briefly discussed as is also the change of the relative amounts of elastic scattering and neutralization with pressure at constant voltage. The amount of neutralization compared to elastic scattering is large in all six cases. The elastic scattering in ethylene is somewhat similar to that in methane whereas that in propylene is somewhat greater.