Fusion excitation function measurement for ⁶Li+⁶⁴Ni at near-barrier energies

¹ Saha Institute of Nuclear Physics, 1/AF, Bidhan Nagar, Kolkata - 700 064, INDIA
² Department of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Mumbai - 400 005, INDIA
³ Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai - 400 085, INDIA

^a e-mail: moin.shaikh@saha.ac.in

Published online: 29 January 2015

Abstract

Total fusion excitation function has been measured for the reaction of weakly bound ⁶Li projectile on medium mass ⁶⁴Ni target at energies near the Coulomb barrier of the system. Online characteristic γ-ray detection method has been used to identify and determine the cross sections of the residues. No suppression of total fusion cross section (σ_TF) is observed at above barrier energies. But enhancement of measured cross section with respect to the one-dimensional barrier penetration model (1-DBPM) calculation is observed at below barrier energies. The enhancement can not be explained by coupled channels calculation with dominant projectile and target excitations as well as one-neutron stripping reaction.