New measurement of the \(E_{\mathrm{c.m.}}=323\) keV resonance in the \(^{19}\)F\((\)p,\gamma\()\)^{20}$Ne reaction

At temperatures below 0.1 GK the \(^{19}\)F\((p,\gamma)^{20}\)Ne reaction is the only breakout path out of the CNO cycle. Experimental studies of this reaction are challenging from a technical perspective due to copious \(\gamma\)-ray background from the far stronger \(^{19}\)F\((p,\alpha)^{16}\)O r...

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Bibliographic Details
Published inarXiv.org
Main Authors Williams, M, Adsley, P, Davids, B, Greife, U, Hutcheon, D, Karpesky, J, Lennarz, A, Lovely, M, Ruiz, C
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 13.06.2022
Subjects
Alpha rays
Gamma rays
Inverse kinematics
Resonance
Thermonuclear reactions
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Summary:At temperatures below 0.1 GK the \(^{19}\)F\((p,\gamma)^{20}\)Ne reaction is the only breakout path out of the CNO cycle. Experimental studies of this reaction are challenging from a technical perspective due to copious \(\gamma\)-ray background from the far stronger \(^{19}\)F\((p,\alpha)^{16}\)O reaction channel. Here we present the first inverse kinematics study of the \(^{19}\)F\((p,\gamma)^{20}\)Ne reaction, in which we measure the strength of the 323-keV resonance. We find a strength value of \(\omega\gamma = 3.3^{+1.1}_{-0.9}\) meV, which is a factor of two larger than the most recent previous study. The discrepancy is likely the result of a direct to ground state transition which previous studies were not sensitive to. We also observe the transition to the first \(2^{-}\) state, which has not been observed for this resonance in previous studies. A new thermonuclear reaction rate is calculated and compared with the literature.
ISSN:2331-8422
DOI:10.48550/arxiv.2206.06044