Proton decay branching ratio for the 6.15-MeV 18Ne level

D. W. Bardayan, ORNL Physics Division
J. C. Blackmon, Louisiana State University
R. L. Kozub, Tennessee Technological University
M. Matoš, Louisiana State University
M. S. Smith, ORNL Physics Division


The 14O(α,p)17F reaction is an important trigger to the αp process in x-ray bursts. Only limited information is available from direct measurements of the reaction cross section, and the time-inverse 17F(p,α)14O reaction has been frequently used to constrain the astrophysical reaction rate. These time-inverse measurements must be complemented by inelastic 17F(p,p′)17F* studies to constrain branches populating the first excited state of 17F. Discrepancies in the literature are examined in relationship to directly measured 17F(p,p′)17F* data, and it is shown that a resolution is possible. Claims of alternative spin assignments for the 6.15-MeV level are also discussed in relationship to the measured inelastic data. © 2012 American Physical Society.