On the Theory of the Inelastic Scattering of Electrons by Helium Atoms

Abstract

The familiar relationship between the optical properties of an atom and its cross sections for inelastic electron collisions can provide a valuable criterion for the validity of such cross sections. A method of exploiting this relationship is explained and then illustrated by application to two transitions of helium (transitions to the 2 1P state, and to the ionization limit), thereby correcting erroneous cross sections of long standing in the literature. Other applications are suggested, and a general proposal for obtaining more accurate cross sections is advanced.