par Byron Jr., FW;Joachain, Charles
Référence Physical review. A, Atomic, Molecular, and Optical Physics, 15, 1, page (128-146)
Publication Publié, 1977
Article révisé par les pairs
Résumé : The elastic scattering of fast electrons and positrons by complex atoms is analyzed by using the basic ideas of the eikonal-Born series method within the framework of the optical-model formalism. This approach allows us to derive from first principles a local second-order pseudopotential which in addition to the static interaction also accounts for polarization, absorption, and exchange effects. A full wave treatment of this pseudopotential is then performed. Our ab initio optical-model theory is illustrated by a detailed analysis of the elastic scattering of electrons and positrons by helium and neon atoms for incident energies ranging from 100 to 700 eV. Our theoretical values for electron-helium and electron-neon differential cross sections are in excellent agreement with recent absolute experimental data. © 1977 The American Physical Society.