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...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2022-06
Main Authors: Williams, M, Adsley, P, Davids, B, Greife, U, Hutcheon, D, Karpesky, J, Lennarz, A, Lovely, M, Ruiz, C
Format: Article
Language:English
Subjects:
Alpha rays
Gamma rays
Inverse kinematics
Resonance
Thermonuclear reactions
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
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