Elastic electron scattering by argon in the vicinity of the high-energy critical minimum

Abstract

Differential cross sections (DCSs) for elastic electron scattering by argon in the vicinity of the high-energy critical minimum are presented. DCSs were measured as a function of both incident electron energy (90– 150 eV ) and scattering angle (40–126°). The absolute calibration was achieved via normalization to a single point. The positions of high-angle DCS minimum versus incident electron energy were obtained. The experimentally obtained results are compared to the relativistic ab initio calculations based on the Dirac–Hartree–Fock method.