Influence of neutron excess on fusion hindrance in neutron-rich radioactive Sn induced reactions

Fusion enhancement has been observed in reactions induced by neutron-rich radioactive beams at energies near the Coulomb barrier. In heavier systems, fusion is hindered because of quasifission. Whether the hindrance will cancel out the enhancement brought by neutron-rich radioactive nuclei is an open question. We have measured evaporation residue cross sections for neutron-rich radioactive Sn on Ni targets to study the influence of neutron excess on the amalgamation process. A model independent comparison between $^{132}$Sn+$^{58}$Ni and $^{126}$Sn+$^{64}$Ni will be made. The isotope dependence of fusion hindrance in $^{124,126,127,128}$Sn on $^{64}$Ni will be examined.