Core-corrected modified Glauber approximation for e ±-alkali-metal-atom collisions

Abstract

The total cross sections for electron and positron scattering by alkali-metal atoms (Li, Na and K) are calculated in a core-corrected modified Glauber approximation using the model potential approach. The results at low intermediate energies are found to be closer to the experimental values of e ± −K total cross section recently measured by Stein et al. (Phys. Rev. Letters 55 (1985) 488). The positron cross sections obtained are also somewhat smaller than the electron ones, as experimental results seem to indicate. Calculations are also performed with the frozen-core approximation.