Nonperturbative treatment of medium-energy proton scattering under shadowing-blocking conditions in Al(110)

Abstract

Measurements of the energy spectrum for 98 keV protons backscattered from Al(110) under shadowingblocking conditions have been performed with high resolution. The corresponding energy losses at central collisions are dominated by ionization of the Al inner shells. In connection with coupled-channel calculations for the electronic energy loss in individual atomic collisions, we discuss the influence of higher-order effects and surface relaxation in the simulation of the strongly asymmetric surface peak.