Resonant suppression of the above-barrier fusion cross-section in ¹⁹O + ¹²C

2025/01/22 by Desilets, H., Kumar, Rohit, deSouza, R. T. +8
#FOS: Physical sciences #Nuclear Experiment (nucl-ex)

paper · doi:10.48550/arxiv.2501.12995

Abstract

Fusion excitation functions for ¹⁹O and ¹⁹F + ¹²C were simultaneously measured along with ²⁰O + ¹²C using the active-target detector MuSIC@Indiana. Examination of the cross-section just above the barrier reveals a significant suppression of fusion for the ¹⁹O + ¹²C system at E_c.m.~12 MeV. This suppression may be due to the formation of a transient ¹⁸O-n-¹²C molecule-like complex favored at a particular angular momentum. Mean-field level models are used as a reference to understand the measured fusion excitation functions.

Related

• Observation of oscillations and near-barrier suppression in the fusion of ²⁰O + p
• In search of beyond mean-field signatures in heavy-ion fusion reactions
• Fusion Enhancement for Neutron-Rich Light Nuclei
• Enhancement of fusion at near and sub-barrier energies for neutron-rich light nuclei
• Fusion cross section for the reaction ¹⁸O+¹²C at 16.7 MeV/nucleon