Fusion reaction of a weakly-bound nucleus with a deformed target

Abstract

We discuss the role of deformation of the target nucleus in the fusion reaction of the ¹⁵C+²³²Th system at energies around the Coulomb barrier, in which ¹⁵C is a well-known one-neutron halo nucleus. To this end, we construct the potential between ¹⁵C and ²³²Th with the double folding procedure, assuming that the projectile nucleus is composed of the core nucleus, ¹⁴C, and a valence neutron. In addition, we also take into account the coupling to the one-neutron transfer process to the 14C+233Th configuration. We show that such calculation simultaneously reproduces the fusion cross sections for the 14C+²³²Th and the ¹⁵C+²³²Th systems, implying an important role of the transfer coupling in fusion of neutron-rich nuclei.