Enhanced evaporation residue cross sections in neutron-rich radioactive ¹³²Sn on ⁶⁴Ni

Evaporation residue cross sections have been measured with neutron-rich radioactive ¹³²Sn beams on ⁶⁴Ni in the vicinity of the Coulomb barrier. The average beam intensity was 2 × 10⁴ particles per second and the smallest cross section measured was less than 5 mb. Large sub-barrier fusion enhancement was observed. The measurement is compared to coupled-channel calculations taking into account inelastic excitation and nucleon transfer.