Role of Neutron Transfer in Sub-Barrier Fusion
Abstract
Fusion excitation function of 35Cl + 130Te system is measured in the energy range around the Coulomb barrier and analyzed in the framework of the coupled-channels approach. The role of projectile deformation, nuclear structure, and the couplings of inelastic excitations and positive Q-value neutron transfer channels in sub-barrier fusion are investigated through the comparison of reduced fusion excitation functions of 35,37Cl +130Te systems. The reduced fusion excitation function of 35Cl + 130Te system shows substantial enhancement over 37Cl + 130Te system in sub-barrier energy region which is attributed to the presence of positive Q-value neutron transfer channels in 35Cl + 130Te system. Findings of this work strongly suggest the importance of +2n - transfer coupling in sub-barrier fusion apart from the simple inclusion of inelastic excitations of interacting partners, and are in stark contrast with the results presented by Kohley et al., [Phys. Rev. Lett. 107, 202701 (2011)].
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