Measurement of the 183 keV resonance in O17(p,α)N14 using a novel technique

B. H. Moazen, D. W. Bardayan, J. C. Blackmon, K. Y. Chae, K. Chipps, C. P. Domizioli, R. Fitzgerald, U. Greife, W. R. Hix, K. L. Jones, R. L. Kozub, E. J. Lingerfelt, R. J. Livesay, C. D. Nesaraja, S. D. Pain, L. F. Roberts, J. F. Shriner Jr., M. S. Smith, and J. S. Thomas
Phys. Rev. C 75, 065801 – Published 4 June 2007

Abstract

We have developed a novel technique for measurements of low-energy (p,α) reactions using heavy-ion beams and a differentially pumped windowless gas target. We applied this new approach to study the 183 keV resonance in the O17(p,α)N14 reaction. We report a (center-of-mass) resonance energy of Er=183.5+0.10.4 keV and a resonance strength of ωγpα=(1.70±0.15) meV, and we set an upper limit (95% confidence) on the total width of the state of Γ<0.1 keV. This resonance is important for the O17(p,α)N14 reaction rate, and we find that F18 production is significantly decreased in low-mass ONeMg novae but less affected in more energetic novae. We also report the first determination of the stopping power for oxygen ions in hydrogen gas near the peak of the Bragg curve (E=193 keV/u) to be (63±1)×1015 eV cm2.

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  • Received 14 March 2007

DOI:https://doi.org/10.1103/PhysRevC.75.065801

©2007 American Physical Society

Authors & Affiliations

B. H. Moazen1,2, D. W. Bardayan1, J. C. Blackmon1, K. Y. Chae1,2, K. Chipps3, C. P. Domizioli4, R. Fitzgerald5, U. Greife3, W. R. Hix1,2, K. L. Jones2,6, R. L. Kozub4, E. J. Lingerfelt1,2, R. J. Livesay3, C. D. Nesaraja1,2, S. D. Pain6, L. F. Roberts1, J. F. Shriner Jr.4, M. S. Smith1, and J. S. Thomas6

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

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Issue

Vol. 75, Iss. 6 — June 2007

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