Exit angle, energy loss and internuclear distance distributions of H2+ ions dissociated when traversing different materials

We have performed computer simulations of the trajectory followed by each proton resulting from the dissociation of Ht molecules when traversing a thin solid target. We use the dielectric formalism to describe the forces due to electronic excitations in the medium, and we also consider the Coulomb repulsion between the pair of protons. Nuclear collisions with target nuclei are incorporated through a Monte Carlo code and the effect of the coherent scattering is taken into account by means of an effective force model. The distributions of exit angle, energy loss and internuclear separations of the protons fragments are discussed for the case of amorphous carbon and aluminum targets. (C) 2000 Elsevier Science B.V. All rights reserved.