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Phys. Rev. C 62, 042802 (2000) [4 pages]

Kinematically complete measurement of the 1H(18F,p)18F excitation function for the astrophysically important 7.08-MeV state in 19Ne

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D. W. Bardayan1,2, J. C. Blackmon1, W. Bradfield-Smith3, C. R. Brune2, A. E. Champagne2, T. Davinson4, B. A. Johnson5, R. L. Kozub5, C. S. Lee6, R. Lewis3, P. D. Parker3, A. C. Shotter4, M. S. Smith1, D. W. Visser3, and P. J. Woods4
1Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
2Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27599
3A. W. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06511
4Department of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
5Physics Department, Tennessee Technological University, Cookeville, Tennessee 38505
6Department of Physics, Chung-Ang University, Seoul 156-756, South Korea

Rapid Communication Received 11 May 2000; published 1 September 2000

Knowledge of the astrophysical 18F(p,α)15O rate is important for understanding gamma-ray emission from novae and heavy-element production in x-ray bursts. A state with Ex≃7.08 MeV in 19Ne provides an s-wave resonance and, depending on its properties, could dominate the 18F(p,α)15O rate. By measuring a kinematically complete 1H(18F,p)18F excitation function with a radioactive 18F beam at the ORNL Holifield Radioactive Ion Beam Facility, we find that the 19Ne state lies at a center-of-mass energy of 665.3±1.7 keV (Ex=7077±2 keV), has a total width of 38.5±3.4 keV, and a proton partial-width of 15.8±1.6 keV.


©2000 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevC.62.042802
DOI: 10.1103/PhysRevC.62.042802
PACS: 27.20.+n, 25.40.Cm, 25.60.-t, 26.30.+k, 27.20.+n, 25.40.Cm, 25.60.-t, 26.30.+k

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