Evolution of fusion hindrance for asymmetric systems at deep sub barrier   energies
  Measurements of fusion cross-sections of 7Li and 12C with 198Pt at deep sub-barrier energies are reported to unravel the role of the entrance channel in the occurrence of fusion hindrance. The onset of fusion hindrance has been clearly observed in 12C + 198Pt system but not in 7Li + 198Pt system, within the measured energy range. Emergence of the hindrance, moving from lighter (6,7Li) to heavier (12C,16O) projectiles is explained employing a model that considers a gradual transition from a sudden to adiabatic regime at low energies. The model calculation reveals a weak effect of the damping of coupling to collective motion for the present systems as compared to that obtained for systems with heavier projectiles. 
A. Shrivastavaa, K. Mahata, S.K. Pandit, V. Nanal, T. Ichikawa, K.   Hagino, A. Navin, C.S. Palshetkar, V.V. Parkar, K. Rama...
nucl-ex nucl-th