Evolution of fusion hindrance for asymmetric systems at deep sub-barrier energies

Abstract : 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 +198Ptsystem but not in 7Li+198Ptsystem, 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.
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Submitted on : Monday, April 4, 2016 - 3:34:17 PM
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A. Shrivastava, K. Mahata, S.K. Pandit, V. Nanal, T. Ichikawa, et al.. Evolution of fusion hindrance for asymmetric systems at deep sub-barrier energies. Physics Letters B, Elsevier, 2016, 755, pp.332-336. ⟨10.1016/j.physletb.2016.02.029⟩. ⟨in2p3-01297636⟩

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