A quasi-adiabatic polarization potential for elestic electron—atom scattering. Helium and other atoms

Abstract

The polarizability function which appears in the quasi-adiabatic polarization proposed previously is approximated in terms of the oscillator strength sum, S( k) ( k = 0, −2, −4, and −6). Numerical calculations of the electron—atom elastic cross sections are made for helium at 50–500 eV. The polarizability functions for several rare-gas, alkali, and alkaline-earth atoms are also estimated.