The multistate eikonal treatment of electron-atom collisions

Abstract
The basic equation for the scattering amplitude as determined from a multistate eikonal description of electron-atom collisions is presented. The relationship with other semiclassical treatments is examined. Four-state eikonal calculations of the cross sections for elastic and the 2s and 2p excitations of H(1s) by electrons with incident energy E in the range 13.6 eV<or=200 eV are carried out, and are compared with other refined theoretical treatments and with experiment.