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

S. Hudan, R. T. deSouza, A. S. Umar, Z. Lin, and C. J. Horowitz
Phys. Rev. C 101, 061601(R) – Published 11 June 2020

Abstract

Above-barrier fusion cross sections for an isotopic chain of oxygen isotopes with A=16–19 incident on a C12 target are presented. Experimental data are compared with both static and dynamical microscopic calculations. These calculations are unable to explain the 37% increase in the average above-barrier fusion cross section observed for O19 as compared to β-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.

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  • Received 31 March 2020
  • Revised 20 April 2020
  • Accepted 26 May 2020

DOI:https://doi.org/10.1103/PhysRevC.101.061601

©2020 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

S. Hudan and R. T. deSouza*

  • Department of Chemistry and Center for Exploration of Energy and Matter, Indiana University, 2401 Milo B. Sampson Lane, Bloomington, Indiana 47408, USA

A. S. Umar

  • Department of Physics and Astronomy, Vanderbilt University Nashville, Tennessee 37235, USA

Z. Lin

  • Department of Physics and Center for Exploration of Energy and Matter, Indiana University, 2401 Milo B. Sampson Lane, Bloomington, Indiana 47408, USA and Department of Physics, Arizona State University, 450 E. Tyler Mall, Tempe, Arizona 85287-1504, USA

C. J. Horowitz

  • Department of Physics and Center for Exploration of Energy and Matter, Indiana University, 2401 Milo B. Sampson Lane, Bloomington, Indiana 47408, USA

  • *desouza@indiana.edu

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Issue

Vol. 101, Iss. 6 — June 2020

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