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

H. Desilets; Rohit Kumar; R. T. deSouza; S. Hudan; C. Ciampi; A. Chbihi; K. W. Brown; K. Godbey; B. Pinheiro; E. N. Cardozo; J. Lubian

arXiv · 2501.12995

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

H. Desilets·Rohit Kumar·R. T. deSouza·S. Hudan·C. Ciampi·A. Chbihi·K. W. Brown·K. Godbey·B. Pinheiro·E. N. Cardozo·J. Lubian

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Abstract

Fusion excitation functions for $^{19}$O and $^{19}$F + $^{12}$C were simultaneously measured along with $^{20}$O + $^{12}$C using the active-target detector MuSIC@Indiana. Examination of the cross-section just above the barrier reveals a significant suppression of fusion for the $^{19}$O + $^{12}$C system at E$_{c.m.}$~12 MeV. This suppression may be due to the formation of a transient $^{18}$O-n-$^{12}$C 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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H. Desilets, Rohit Kumar, R. T. deSouza, S. Hudan, C. Ciampi, A. Chbihi, K. W. Brown, K. Godbey, B. Pinheiro, E. N. Cardozo, J. Lubian. 2025-01-22. Resonant suppression of the above-barrier fusion cross-section in $^{19}$O + $^{12}$C. https://arxiv.org/abs/2501.12995

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