Direct transfer reactions derived from the green's functions method

Abstract

Direct transfer reactions are extracted from the general many body theory of nuclear reactions. Especially the case of ground state transitions is considered explicitly for single- and two-nucleon transfer reactions. For this the two- and the three-particle Green's functions respectively are to be used. In deriving theT-matrices of scattering theory plausible assumptions on the energy dependence of the correspondingK-matrices are made. Expressions for direct reactions are obtained which look similar to DWBA. The resultingT-matrices contain microscopic many body expressions for the effective interaction and the optical potentials instead of the phenomenological ones of DWBA.