Ionization Cross Sections in He, Ne, A, Kr and Xe by Electron Impact†

Abstract

Measurements of the total ionization cross sections for the rare gases helium, neon, argon, krypton mid xenon under electron impact extending over the electron energy range up to 100 ev have been made with a Tate and Smith apparatus and a Lozier type apparatus. The two sets of measurements show close agreement with one another in the entire electron energy range; however, some deviation from earlier data is observed. The first ionization potentials were determined using tin absolute method for the electron energy calibration, and the agreement with the spectroscopic values is within the error in the electron energy mensurement, which is ±0.08 ov.