Charge-Changing Collisions of 0.7–2.0 Mev Helium Beams in Various Gases. II. Electron Loss

Abstract

The single and double electron loss cross sections σ 01 , σ 12 and σ 02 of helium beams have been measured for target gases H 2 , He, N 2 , O 2 , CO 2 , CH 4 , C 2 H 6 and C 3 H 8 in the energy range from 0.7 to 2.0 MeV. By using cross sections for carbon-containing molecules, the additive rule was verified for the electron loss processes of helium beams in this energy region. Loss cross sections for a carbon atom were deduced. Empirical formulae for single electron loss cross sections were obtained for atomic targets H, He, C, N and O. The ratio between two single electron loss cross sections, σ 01 /σ 12 , and the ratio between single and double electron loss cross sections, σ 01 /σ 02 are discussed.