Reaction dynamics for the system 17F+58Ni at near-barrier energies

Charged reaction products originated from the interaction of the loosely bound radioactive ion beam F-17 (S-p = 600 keV) with the proton-shell closed Ni-58 target were measured at two colliding energies slightly above the Coulomb barrier. The collected data were analyzed within the framework of the optical model to deduce the reaction cross section and to investigate the role played by inelastic excitations, transfer channels, and the breakup process F-17 --> O-16 + p at near-barrier energies. The reaction cross section at the lower F-17 energy showed a moderate enhancement (similar to 20%) with respect to that of the system O-16 + Ni-58. At this energy direct reaction channels were also found to be more relevant than those for the reaction induced from the tightly bound projectile O-16 on the same target. Both features could be strongly related to the very low binding energy of the F-17 valence proton.