Microscopic description of the two-step direct pre-equilibrium process with non-local potentials and collective states

We present our calculation of contributions to the pre-equilibrium emission cross section coming from two-step direct processes, using a fully microscopic approach based on the nuclear matter method, and treating explicitly the non locality in the potentials. Collective states are included using the Random Phase Approximation (RPA) nuclear structure model. Collective excitations enhanced the two-step cross section when compared to a calculation performed with uncorrelated particle-hole excitations. This results, as well as possible improvements of our modeling, are discussed.