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Searching for resonances in the unbound 6Be nucleus by using a radioactive 7Be beam

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Abstract

Knowledge of the 3He(3He,2p)4He reaction is important for understanding stellar burning and solar neutrino production. Previous measurements have found a surprisingly large rise in the cross section at low energies that could be due to a low-energy resonance in the 3He + 3He (6Be) system or electron screening. In the 6Be nucleus, however, no excited states have been observed above the first 2+ state at E x = 1.67 MeV up to 23 MeV, even though several are expected. The 2H(7Be,3H)6Be reaction has been studied for the first time to search for resonances in the 6Be nucleus that may affect our understanding of the 3He(3He,2p)4He reaction. A 100-MeV radioactive 7Be beam from the Holifield Radioactive Ion Beam Facility (HRIBF) was used to bombard CD2 targets, and tritons were detected by using the silicon detector array (SIDAR). A combination of reaction mechanisms appears to be necessary to explain the observed triton energy spectrum.

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Authors and Affiliations

  1. Department of Physics, Sungkyunkwan University, Suwon, 440-746, Korea

    K. Y. Chae

  2. Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee, 37996, USA

    K. Y. Chae, Z. Ma & C. D. Nesaraja

  3. Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831, USA

    D. W. Bardayan, J. C. Blackmon, M. S. Smith, Z. Ma & C. D. Nesaraja

  4. Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina, 27599, USA

    A. E. Champagne, R. P. Fitzgerald & D. W. Visser

  5. Inter University Accelerator Centre, New Delhi, 110067, India

    J. J. Das

  6. Instituto de Física, Universidade de São Paulo, C.P. 66318, São Paulo, 05389-970, SP, Brazil

    V. Guimarães

  7. Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey, 08854, USA

    K. L. Jones, S. D. Pain & J. S. Thomas

  8. Oak Ridge Associated Universities, Bldg 6008, P.O. Box 2008, Oak Ridge, Tennessee, 37831, USA

    M. S. Johnson

  9. Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, California, 94550, USA

    M. S. Johnson

  10. One Washington Square, San Jose State University, San Jose, California, 95192, USA

    M. S. Johnson

  11. Department of Physics, Tennessee Technological University, Cookeville, Tennessee, 38505, USA

    R. L. Kozub

  12. Department of Physics, Colorado School of Mines, Golden, Colorado, 80401, USA

    R. J. Livesay

Authors
  1. K. Y. Chae
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  2. D. W. Bardayan
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  3. J. C. Blackmon
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  4. M. S. Smith
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  5. A. E. Champagne
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  6. R. P. Fitzgerald
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  7. D. W. Visser
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  8. J. J. Das
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  9. V. Guimarães
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  10. K. L. Jones
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  11. S. D. Pain
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  12. J. S. Thomas
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  13. M. S. Johnson
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  14. R. L. Kozub
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  15. R. J. Livesay
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  16. Z. Ma
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  17. C. D. Nesaraja
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Corresponding author

Correspondence to K. Y. Chae.

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Chae, K.Y., Bardayan, D.W., Blackmon, J.C. et al. Searching for resonances in the unbound 6Be nucleus by using a radioactive 7Be beam. Journal of the Korean Physical Society 61, 1786–1791 (2012). https://doi.org/10.3938/jkps.61.1786

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  • DOI: https://doi.org/10.3938/jkps.61.1786

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