2e- transfer and excitation formalism in ion-atom collisions at high energies -: art. no. 032711

An analytical expression for the transition amplitude is obtained by means of the continuum distorted-wave approximation of Cheshire, in order to study the double capture and excitation process. The Dodd-Greider formalism is used to provide a way of connecting the diagrams in the subseries by introducing an intermediate channel. This expression, so derived, is a rigorous first-order term of a perturbation series.