Be8+Be8 and C12+α breakup states in O16 populated via the C13(He4,4α)n reaction

N. Curtis, S. Almaraz-Calderon, A. Aprahamian, N. I. Ashwood, M. Barr, B. Bucher, P. Copp, M. Couder, X. Fang, M. Freer, G. Goldring, F. Jung, S. R. Lesher, W. Lu, J. D. Malcolm, A. Roberts, W. P. Tan, C. Wheldon, and V. A. Ziman
Phys. Rev. C 94, 034313 – Published 13 September 2016

Abstract

The C13(He4,4α)n breakup reaction has been studied at beam energies of 27.0, 27.5, and 28.0 MeV. A comparison with previous measurements of the C12(He4,Be8)Be8 excitation function and C12(O16,4α)C12 breakup channel suggests the Begs8+Begs8 decay of O16 is observed from a possible 2+ state at 17.3±0.2 MeV, a 4+ state at 18.0±0.2 MeV, a 2+ or 4+ state at 19.4±0.2 MeV, and a 4+ or 6+ state at 21.0±0.2 MeV. The 2+ or 4+ assignment for the (19.4±0.2)-MeV state appears to be supported by the relative cross sections expected for resonant and sequential breakup reactions.

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  • Received 12 June 2015
  • Revised 21 July 2016

DOI:https://doi.org/10.1103/PhysRevC.94.034313

©2016 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

N. Curtis1,*, S. Almaraz-Calderon2, A. Aprahamian2, N. I. Ashwood1, M. Barr1, B. Bucher2, P. Copp3, M. Couder2, X. Fang2, M. Freer1, G. Goldring4, F. Jung2, S. R. Lesher3, W. Lu2, J. D. Malcolm1, A. Roberts2, W. P. Tan2, C. Wheldon1, and V. A. Ziman1

  • 1School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
  • 2Institute for Structure and Nuclear Astrophysics, Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
  • 3Department of Physics, University of Wisconsin-La Crosse, La Crosse, Wisconsin 54601, USA
  • 4Department of Particle Physics, Weizmann Institute, 76100 Rehovot, Israel

  • *Corresponding author: n.curtis@bham.ac.uk

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Vol. 94, Iss. 3 — September 2016

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