Fusion of 16O + 46,50Ti near and below the coulomb barrier

Abstract

Fusion excitation functions for the systems 16O + 46,50Ti at bombarding energies in the range 30 ≦ Elab(16O) ≤ 65 MeV were measured by means of the γ-ray spectroscopy technique. The fusion excitation functions are analysed using a semi-classical one-dimensional barrier-penetration model with different nuclear potentials describing the heavy-ion interaction. Fusion barrier parameters were extracted. The observed fusion cross sections at sub-barrier energies are larger than predicted by this conventional model. The fusion enhancement at sub-barrier energies for these systems can be explained by the simple approach of the Wong model, considering explicity the quadrupole deformation parameter of the target nucleus.