Position –Dependent of Relative Energy Straggling

Abstract

Collisional electronic energy-loss straggling has been studied theoretically on the basis of the distant-collision contribution to straggling. The present work is to estimate the energy straggling of sub-shell for target atoms using impact parameter representation of swift charged particle under grazing incidence of solid targets.The effect of excited core electrons which has frequently been neglected is shown to be significant .The numerical formulas, found in the research ,were solved by using computer program in (Fortran-90).