Measurement of <sup>19</sup>Ne Excited States Relevant to the <sup>18</sup>F(p,α)<sup>15</sup>O Reaction in Classical Novae

ORAL

Abstract

Classical novae emit intense γ-ray radiation, primarily at 511-keV due to electron-positron annihilation, with the 18F isotope contributing most to observable emissions due to its relatively long half-life. The abundance of 18F in classical novae is mainly controlled by the primary destruction pathway, 18F(p,α)15O, which proceeds through excited states in the compound nucleus 19Ne. Precise abundance calculations of 18F remain hindered largely due to uncertainties in the proton branching ratios of higher-lying states and the Jπ values of the sub- and near-threshold states in 19Ne. In order to more precisely determine the properties of these states, we conducted a 19F(3He,t)19Ne transfer reaction study using the Super-Enge Split-Pole Spectrograph (SE-SPS) at the Fox Accelerator Laboratory at Florida State University. Proton and alpha decays were collected by the Silicon Array for Branching Ratio Experiments (SABRE) in coincidence with the triton reaction products detected at the focal plane. Results for branching ratios and Jπ values of excited states in 19Ne will be presented.

*This work is supported by FSU NSF grant No. PHY-1712953, and US Department of Energy grant No. DE-SC0014231 and DE-FG02-96ER40978.

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Presenters

  • Khang H Pham

    • Louisiana State University

Authors

  • Khang H Pham

    • Louisiana State University

  • Sudarsan Balakrishnan

    • Rutgers University
    • Department of Physics and Astronomy, Rutgers University, New Brunswick, NJ, USA

  • K T Macon

    • Louisiana State University
    • University of Notre Dame

  • Jeff C Blackmon

    • Louisiana State University

  • Catherine M Deibel

    • Louisiana State University

  • Akhil Bhardwaj

    • Louisiana State University

  • William Braverman

    • Louisiana State University

  • Sergio Lopez-Caceres

    • Louisiana State University
    • Argonne National Laboratory

  • Keilah S Davis

    • Louisiana State University

  • David He

    • Louisiana State University

  • Molly McLain

    • Louisiana State University

  • Gordon W McCann

    • Michigan State University

  • Lagy T Baby

    • Florida State University

  • Ingo L Wiedenhoever

    • Florida State University

  • Samuel Oluwamayowa Ajayi

    • Florida State University

  • Caleb B Benetti

    • Florida State University

  • Chris Esparza

    • Florida State University

  • Kenneth G Hanselman

    • Los Alamos National Laboratory

  • Ashton Brooke Morelock

    • Florida State University
    • University of Tennessee, Knoxville

  • Eilens L Lopez Saavedra

    • Argonne National Laboratory

  • Vignesh Sitaraman

    • Florida State University

  • Eli S Temanson

    • Florida State University

  • Catur Wibisono

    • Florida State University