1. Studies of X-ray burst reactions with radioactive ion beams from RESOLUT
- Author
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M. Anastasiou, K. T. Macon, N. Rijal, K. Colbert, Catherine Deibel, N. Quails, H. E. Gardiner, A. Laminack, N. Keely, J. C. Lighthall, Bertis Rasco, J. Lai, Jeff Baker, J. C. Blackmon, Alexander Volya, I. Wiedenhöver, L. E. Linhardt, J. Belarge, E. Need, P. Höflich, Lagy Baby, O. de Lucio, A. Hood, S. A. Kuvin, and E.C. Good
- Subjects
Radioactive ion beams ,Physics ,QC1-999 ,X-ray ,01 natural sciences ,Superconducting accelerator ,Reaction rate ,0103 physical sciences ,Bound state ,Atomic physics ,Proton emission ,010306 general physics ,Nuclear Experiment ,010303 astronomy & astrophysics - Abstract
Reactions on certain proton-rich, radioactive nuclei have been shown to have a significant influence on X-ray bursts. We provide an overview of two recent measurements of important X-ray burst reactions using in-flight radioactive ion beams from the RESOLUT facility at the J. D. Fox Superconducting Accelerator Laboratory at Florida State University. The 17 F(d,n) 18 Ne reaction was measured, and Asymptotic Normalization Coefficients were extracted for bound states in 18 Ne that determine the direct-capture cross section dominating the 17 F(p, γ ) 18 Ne reaction rate for T≲ 0.45 GK. Unbound resonant states were also studied, and the single-particle strength for the 4.523-MeV (3 + ) state was found to be consistent with previous results. The 19 Ne(d,n) 20 Na proton transfer reaction was used to study resonances in the 19 Ne(p, γ ) 20 Na reaction. The most important 2.65-MeV state in 20 Na was observed to decay by proton emission to both the ground and first-excited states in 19 Ne, providing strong evidence for a 3 + spin assignment and indicating that proton capture on the thermally-populated first-excited state in 19 Ne is an important contributor to the 19 Ne(p, γ ) 20 Na reaction rate.
- Published
- 2017