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

2016/02/23 by A. Shrivastavaa, Shrivastavaa, A., K. Mahata +25
Physics and Astronomy · #Atomic and Molecular Physics #FOS: Physical sciences #Nuclear Experiment (nucl-ex) #Nuclear Physics and Applications #Nuclear Theory (nucl-th) #Nuclear physics research studies

paper · pdf · doi:10.48550/arxiv.1602.07095

openalex publication_date 2016/02/23 · openalex created_date 2019/06/27 · openalex updated_date 2026/07/28

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 + 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.

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