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Observation of the Astrophysically Important 3+ State in N18e via Elastic Scattering of a Radioactive F17 Beam from H1

D. W. Bardayan, J. C. Blackmon, C. R. Brune, A. E. Champagne, A. A. Chen, J. M. Cox, T. Davinson, V. Y. Hansper, M. A. Hofstee, B. A. Johnson, R. L. Kozub, Z. Ma, P. D. Parker, D. E. Pierce, M. T. Rabban, A. C. Shotter, M. S. Smith, K. B. Swartz, D. W. Visser, and P. J. Woods
Phys. Rev. Lett. 83, 45 – Published 5 July 1999
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Abstract

The 17F(p,γ)18Ne reaction is important in stellar explosions, but its rate has been uncertain because of an expected 3+ state in 18Ne that has never been conclusively observed. This state would provide a strong =0 resonance and, depending on its excitation energy, could dominate the stellar reaction rate. We have observed this missing 3+ state by measuring the 1H(17F,p)17F excitation function with a radioactive 17F beam at the ORNL Holifield Radioactive Ion Beam Facility. We find that the state lies at a center-of-mass energy of Er=599.8±1.5stat±2.0syskeV ( Ex=4523.7±2.9keV) and has a width of Γ=18±2stat±1syskeV.

  • Received 4 March 1999

DOI:https://doi.org/10.1103/PhysRevLett.83.45

©1999 American Physical Society

Authors & Affiliations

D. W. Bardayan1,2, J. C. Blackmon1, C. R. Brune3, A. E. Champagne3, A. A. Chen2, J. M. Cox4, T. Davinson5, V. Y. Hansper1,3, M. A. Hofstee6, B. A. Johnson4, R. L. Kozub4, Z. Ma1,7,8, P. D. Parker2, D. E. Pierce1, M. T. Rabban1, A. C. Shotter5, M. S. Smith1, K. B. Swartz2, D. W. Visser2, and P. J. Woods5

  • 1Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
  • 2A. W. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06511
  • 3Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27599
  • 4Physics Department, Tennessee Technological University, Cookeville, Tennessee 38505
  • 5Department of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
  • 6Department of Physics, Colorado School of Mines, Golden, Colorado 80401
  • 7Chinese Institute for Atomic Energy, Beijing, 102413, People's Republic of China
  • 8Joint Institute for Heavy Ion Research, Oak Ridge, Tennessee 37831

See Also

Accelerator Astrophysics

Phys. Rev. Focus 4, 2 (1999)

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Issue

Vol. 83, Iss. 1 — 5 July 1999

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