ELECTRON EJECTION FROM CLEAN METALLIC SURFACES UPON CHARGED-PARTICLE IMPACT

In this work we present a theoretical treatment of electron ejection f rom a clean metallic semi-infinite solid with an ideal orthorhombic Br avais lattice following the impact of moderately fast charged particle s with respect to the Fermi momentum of the initially bound electron. For an aluminum semi-infinite solid target multiple differential cross sections have been evaluated using a jellium-type wave function of th e undisturbed surface in the initial state. Image-charge final-state e lectron-surface interactions have been included as well as the scatter ing of the projectile from the multicenter bulk potential. From a kine matic analysis of the process various ionization mechanisms are inferr ed and confirmed by the present dynamical model.