Fast-electron scattering from Ne: A comparison of distorted-wave theory with experiment

摘要

We compare electron-scattering data fromNewith first-order Born and distorted-wave calculations in an energynrange between 300 and 2500 eV and for scattering angles up to 135◦ and for energy losses up to the ionizationnenergy. At small angles the distorted-wave calculations and first-order Born calculations are in good agreement,nbut at large momentum transfer the intensity predicted by the first-order Born theory drops off much faster thannexperiment and distorted-wave calculations. The present distorted-wave calculations reproduce most of thenexperimental observations quite well, except for monopole transitions and near the minima in dipole-allowednto-p transitions. The first-order Born approximation fails completely at larger momentum transfer.