Total cross sections for the scattering of low-energy electrons by helium metastable atoms

Abstract

The absolute total electron scattering cross section for He(21S0) and the relative total electron scattering cross section for He(23S1) have been measured in the electron energy range 0.45-9.4 eV. The results show a structureless decrease of the cross sections with increasing electron energy. Comparisons of the results with theory and with the experimental results of Neynaber et al. (1964) for the triplet scattering cross section are given.