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2+ excitation of the C12 Hoyle state

M. Freer, H. Fujita, Z. Buthelezi, J. Carter, R. W. Fearick, S. V. Förtsch, R. Neveling, S. M. Perez, P. Papka, F. D. Smit, J. A. Swartz, and I. Usman
Phys. Rev. C 80, 041303(R) – Published 19 October 2009

Abstract

A high-energy-resolution magnetic spectrometer has been used to measure the C12 excitation energy spectrum to search for the 2+ excitation of the 7.65 MeV, 0+ Hoyle state. By measuring in the diffractive minimum of the angular distribution for the broad 0+ background, evidence is found for a possible 2+ state at 9.6(1) MeV with a width of 600(100) keV. The implications for the Be8+He4 reaction rate in stellar environments are discussed.

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  • Received 24 January 2009

DOI:https://doi.org/10.1103/PhysRevC.80.041303

©2009 American Physical Society

Authors & Affiliations

M. Freer1, H. Fujita2, Z. Buthelezi3, J. Carter2, R. W. Fearick4, S. V. Förtsch3, R. Neveling3, S. M. Perez3, P. Papka5, F. D. Smit3, J. A. Swartz5, and I. Usman2

  • 1School of Physics and Astronomy, University of Birmingham, Birmingham, B15 2TT, United Kingdom
  • 2School of Physics, University of the Witwatersrand, Johannesburg 2050, South Africa
  • 3iThemba LABS, P.O. Box 722, Somerset West 7129, South Africa
  • 4Physics Department, University of Cape Town, Private Bag, Rondebosch 7700, South Africa
  • 5Physics Department, University of Stellenbosch, Private Bag X1, Matieland 7602, Stellenbosch, South Africa

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Vol. 80, Iss. 4 — October 2009

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