Enhanced dynamics in fusion of neutron-rich oxygen nuclei at above-barrier energies

Abstract

Above-barrier fusion cross-sections for an isotopic chain of oxygen isotopes with A=16-19 incident on a ${}^{12}$C target are presented. Experimental data are compared with both static and dynamical microscopic calculations. These calculations are unable to explain the $\sim$37\% increase in the average above-barrier fusion cross-section observed for ${}^{19}$O as compared to $\beta$-stable oxygen isotopes. This result suggests that for neutron-rich nuclei existing time-dependent Hartree-Fock calculations underpredict the role of dynamics at near-barrier energies. High-quality measurement of above-barrier fusion for an isotopic chain of increasingly neutron-rich nuclei provides an effective means to probe this fusion dynamics.

6 pages, 4 figures

References in corpus (8)

• Current Status of r-Process Nucleosynthesis
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Cited by in corpus (2)

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