New Evidence for Near-Threshold 3/2<sup>+</sup> States in <sup>19</sup>Ne and Constraints on the <sup>18</sup>F(p,α)<sup>15</sup>O Reaction Rate
ORAL
Abstract
Energy levels above the 18F+p threshold in 19Ne are significant for nova nucleosynthesis and the prospect of γ ray detection from novae because they are resonances in the 18F(p,α)15O reaction. In an effort to better understand the astrophysically important levels in 19Ne, the 19F(3He,t)19Ne reaction was studied. Particle-γ-γ coincidences were measured using GODDESS (Gammasphere ORRUBA: Dual Detectors for Experimental Structure Studies), which allows for nuclear structure studies with high angular coverage and resolution, in addition to good energy resolution. Reaction tritons were detected in the Oak Ridge Rutgers University Barrel Array (ORRUBA), an array of position-sensitive silicon strip detectors, in coincidence with γ rays from the de-excitation of 19Ne. Preliminary results from the experiment will be presented.
*This research was supported in part by the National Science Foundation Grant Numbers PHY-1419765 and PHY-1404218, the National Nuclear Security Administration under the Stewardship Science Academic Alliances program through DOE Cooperative Agreement DE-NA002132, DOE Office of Science, Office of Nuclear Physics, under contract number DE-AC05-00OR22725, and Argonne National Laboratory contract number DE-AC02-06CH11357
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Presenters
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Matthew Hall
- Univ of Notre Dame
- University of Notre Dame