Spectroscopic study of the radionuclide Na21 for the astrophysical F17(α,p)Ne20 reaction rate

S. M. Cha (차수미), K. Y. Chae (채경육), S. Ahn (안성훈), D. W. Bardayan, K. A. Chipps, J. A. Cizewski, M. E. Howard, R. L. Kozub, K. Kwak (곽규진), B. Manning, M. Matos, P. D. O'Malley, S. D. Pain, W. A. Peters, S. T. Pittman, A. Ratkiewicz, M. S. Smith, and S. Strauss
Phys. Rev. C 96, 025810 – Published 31 August 2017

Abstract

The Mg24(p,α)Na21 reaction was measured at the Holifield Radioactive Ion Beam Facility of the Oak Ridge National Laboratory to study the spectroscopy of the radionuclide Na21. A 31-MeV proton beam from the 25 MV tandem accelerator bombarded isotopically enriched Mg24 targets. Recoiling He4 particles were identified by an annular silicon strip detector array. Two energy levels at Ex=6.594 and 7.132 MeV were observed for the first time. By comparing the experimentally obtained angular distributions and distorted wave Born approximation calculations, the spins and parities of Na21 energy levels were constrained. The astrophysically-important F17(α,p)Ne20 reaction rate was also calculated for the first time using resonance parameters for 12 energy levels.

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  • Received 28 April 2017

DOI:https://doi.org/10.1103/PhysRevC.96.025810

©2017 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

S. M. Cha (차수미)1, K. Y. Chae (채경육)1,*, S. Ahn (안성훈)2, D. W. Bardayan3, K. A. Chipps4, J. A. Cizewski5, M. E. Howard5, R. L. Kozub6, K. Kwak (곽규진)7, B. Manning5, M. Matos8, P. D. O'Malley5, S. D. Pain9, W. A. Peters10, S. T. Pittman9, A. Ratkiewicz5, M. S. Smith9, and S. Strauss5

  • 1Department of Physics, Sungkyunkwan University, Suwon 16419, Korea
  • 2Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
  • 3Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
  • 4Department of Physics, Colorado School of Mines, Golden, Colorado 80401, USA
  • 5Department of Physics and Astronomy, Rutgers University, New Brunswick, New Jersey 08903, USA
  • 6Department of Physics, Tennessee Technological University, Cookeville, Tennessee 38505, USA
  • 7Department of Physics, School of Natural Science, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea
  • 8Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
  • 9Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
  • 10Oak Ridge Associated Universities, Oak Ridge, Tennessee 37831, USA

  • *kchae@skku.edu

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Issue

Vol. 96, Iss. 2 — August 2017

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