Sub-coulomb barrier fusion of O+Sn

Abstract Evaporation residue excitation functions have been measured for from 30 MeV above to 6 MeV below the Coulomb barrier. Reduced excitation functions, scaled to remove the effects of smoothly varying barrier parameters, do not show any strong dependence on the target or projectile isotope. The relative changes are less than a factor two, and are not correlated with positive Q -values of neutron transfer channels.