Nuclear structure effects in the sub-barrier fusion of O-16+Ge-70,Ge-72,Ge-73,Ge-74,Ge-76

Fusion excitation functions were obtained for O-16 + Ge-70,Ge-72,Ge-73,Ge-74,Ge-76 at energies from about 4 MeV below to 15 MeV or more above the Coulomb barrier. The barrier parameters extracted from the data agree within 2% with those obtained from the systematics for fusion above the barrier Low-energy enhancements are observed whose behavior is explained within the context of simple model calculations by assigning appropriate degrees of freedom to the respective reaction partners. These degrees of freedom are consistent with those used in similar analysis of different data sets where either the same projectile or the same targets were used. An analysis of the barrier distributions is made which supports the previous conclusions.