One-neutron transfer in Ni-Ni interactions below the barrier

Abstract

Using \ensuremath{\gamma}-ray photopeak intensities, excitation functions of one-neutron transfer to excited states in reaction products have been measured from about 20% and 15% below the fusion barrier to above barrier energies for $^{58}$Ni${+\mathrm{}}^{64}$Ni and $^{64}$Ni${+\mathrm{}}^{64}$Ni reactions, respectively. For $^{58}$Ni${+\mathrm{}}^{64}$Ni, the one-neutron transfer cross section is greater than 1 mb at 20% below the barrier. The results are well described by distorted-wave Born approximation calculations using spectroscopic factors deduced from light-ion transfer measurements.