Importance of resonance widths in low-energy scattering of weakly bound light-mass nuclei

P. R. Fraser, K. Massen-Hane, K. Amos, I. Bray, L. Canton, R. Fossión, A. S. Kadyrov, S. Karataglidis, J. P. Svenne, and D. van der Knijff
Phys. Rev. C 94, 034603 – Published 7 September 2016

Abstract

What effect do particle-emitting resonances have on the scattering cross section? What physical considerations are necessary when modeling these resonances? These questions are important when theoretically describing scattering experiments with radioactive ion beams which investigate the frontiers of the table of nuclides, far from stability. Herein, a novel method is developed that describes resonant nuclear scattering from which centroids and widths in the compound nucleus are obtained when one of the interacting bodies has particle unstable resonances. The method gives cross sections without unphysical behavior that is found if simple Lorentzian forms are used to describe resonant target states. The resultant cross sections differ significantly from those obtained when the states in the coupled channel calculations are taken to have zero width, and compound-system resonances are better matched to observed values.

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  • Received 7 May 2016
  • Revised 6 July 2016

DOI:https://doi.org/10.1103/PhysRevC.94.034603

©2016 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

P. R. Fraser1,*, K. Massen-Hane1, K. Amos2,3, I. Bray1, L. Canton4, R. Fossión5, A. S. Kadyrov1, S. Karataglidis2,3, J. P. Svenne6, and D. van der Knijff2

  • 1Department of Physics, Astronomy and Medical Radiation Sciences, Curtin University, GPO Box U1987, Perth 6845, Australia
  • 2School of Physics, University of Melbourne, Victoria 3010, Australia
  • 3Department of Physics, University of Johannesburg, P.O. Box 524, Auckland Park, 2006, South Africa
  • 4Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131, Italy
  • 5Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, 04510, Ciudad de México, Mexico
  • 6Department of Physics and Astronomy, University of Manitoba and Winnipeg Institute for Theoretical Physics, Winnipeg, Manitoba R3T 2N2, Canada

  • *paul.fraser@curtin.edu.au

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Issue

Vol. 94, Iss. 3 — September 2016

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