Continuum Distorted Wave and Wannier Methods

Theoretical total charge transfer cross sections and differential ionization cross sections for ion–atom collisions illustrated for the system

“…Calculating accurate cross sections for electron excitation, ionization and charge transfer produced in a fast ion-atom collision has been the aim of many authors in the last three decades (Lapicki, 2005;Crothers et al, 1996;Bradley et al, 2005;Olsen, 1996;Knoop et al, 2005;Ford and Reading, 1996). In this short article we chose to focus not on the success of these efforts but rather to concentrate on the difficulties still remaining.…”

“…The perturbed stationary state, PSS, approximation (Lapicki, 2005), modifies the unperturbed initial state approximation of the first Born approximation as does the continuum distorted wave (CDW) approximation (Crothers, 1996). Both approximate a quantum approach.…”