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