Improved calculations of the electronic energy loss under channeling conditions

Abstract

Ab-initio calculations of the electronic stopping power are important not only as benchmark tests for many simplified models but also because they provide fundamental insights into the underlying physics of the energy dissipation of ions penetrating matter. In this work we investigate the electronic energy loss processes by using the coupled-channel method. This first-principle calculation is based on the solution of the time-dependent Schrödinger equation in the framework of the independent particle model. A brief review of such calculations is presented and special emphasis is given on recent calculations of the energy dependence of the stopping power for He ions channeling along the Si 〈1 0 0〉 direction, a system of interest for ion beam analysis.