Effects of unconventional breakup modes on incomplete fusion of weakly bound nuclei

Abstract

The incomplete fusion dynamics of Li6+Bi209 collisions at energies above the Coulomb barrier is investigated. The classical dynamical model implemented in the platypus code is used to understand and quantify the impact of both Li6 resonance states and transfer-triggered breakup modes (involving short-lived projectile-like nuclei such as Be8 and Li5) on the formation of incomplete fusion products. Model calculations explain the experimental incomplete-fusion excitation function fairly well, indicating that (i) delayed direct breakup of Li6 reduces the incomplete fusion cross sections and (ii) the neutron-stripping channel practically determines those cross sections.