Sub-barrier fusion and transfers in the ⁴⁰Ca + ^58,64Ni systems

Fusion cross sections have been measured in the ⁴⁰Ca + ⁵⁸Ni and ⁴⁰Ca + ⁶⁴Ni systems at energies around and below the Coulomb barrier. The ⁴⁰Ca beam was delivered by the XTU Tandem accelerator of the Laboratori Nazionali di Legnaro and evaporation residues were measured at very forward angles with the LNL electrostatic beam deflector. Coupled-channels calculations were performed which highlight possible strong effects of neutron transfers on the fusion below the barrier in the ⁴⁰Ca + ⁶⁴Ni system. Microscopic time-dependent Hartree-Fock calculations have also been performed for both systems. Preliminary results are shown. (authors)