O-16+Cu-65 and F-19+Ni-62 at 16 A MeV reaction mechanisms comparison: Pre-equilibrium vs. clustering

Cluster structure effects in nuclei have been investigated looking to the pre-equilibrium particles emitted in the O-16+Cu-65 and F-19+Ni-62 reactions at the same beam velocity of 16 A MeV which lead to the same Rb-81* compound nucleus. Despite the slight difference in excitation energies, the same fast emission should be expected from the two systems; unless major effects induced by the projectile's cluster structure, which should influence the pre-equilibrium a-particle production during the non-equilibrium stage, are present. The experimental data have been collected with the GARFIELD+RCo apparatus at Laboratori Nazionali di Legnaro. In this contribution we report on the preliminary spectra of light-charged particles, obtained in coincidence with evaporation residues, and their comparison with the results obtained from model calculations.