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First proton-transfer study of 18F+p resonances relevant for novae

A. S. Adekola, D. W. Bardayan, J. C. Blackmon, C. R. Brune, K. Y. Chae, C. Domizioli, U. Greife, Z. Heinen, M. J. Hornish, K. L. Jones, R. L. Kozub, R. J. Livesay, Z. Ma, T. N. Massey, B. Moazen, C. D. Nesaraja, S. D. Pain, J. F. Shriner, Jr., N. D. Smith, M. S. Smith, J. S. Thomas, D. W. Visser, and A. V. Voinov
Phys. Rev. C 83, 052801(R) – Published 24 May 2011

Abstract

The 18F(p,α)15O reaction is the predominant destruction mechanism in novae of the radionuclide F18, a target of γ-ray observatories. Thus, its rate is important for understanding F18 production in novae. We have studied resonances in the 18F+p system by making a measurement of a proton-transfer reaction 18F(d,n). We have observed 15 Ne19 levels, 5 of which are below the proton threshold, including a subthreshold state, which has significant lp=0 strength. Our data provide a direct determination of the spectroscopic strength of these states and new constraints on their spins and parities, thereby resolving a controversy, which involves the 8- and 38-keV resonances. The 18F(p,α)15O reaction rate is reevaluated, which takes the subthreshold resonance and other new information determined in this experiment into account.

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  • Received 26 August 2010

DOI:https://doi.org/10.1103/PhysRevC.83.052801

©2011 American Physical Society

Authors & Affiliations

A. S. Adekola1,2,*, D. W. Bardayan3, J. C. Blackmon3, C. R. Brune1, K. Y. Chae4, C. Domizioli4, U. Greife5, Z. Heinen1, M. J. Hornish1, K. L. Jones2, R. L. Kozub6, R. J. Livesay5, Z. Ma4, T. N. Massey1, B. Moazen4, C. D. Nesaraja3, S. D. Pain2, J. F. Shriner, Jr.6, N. D. Smith6, M. S. Smith3, J. S. Thomas2, D. W. Visser7, and A. V. Voinov1

  • 1Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, USA
  • 2Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854-8019, USA
  • 3Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
  • 4Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
  • 5Department of Physics, Colorado School of Mines, Golden, Colorado 80401, USA
  • 6Department of Physics, Tennessee Technological University, Cookeville, Tennessee 38505, USA
  • 7Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27599, USA

  • *aadekola@physics.rutgers.edu

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Issue

Vol. 83, Iss. 5 — May 2011

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