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First Direct Measurement of the 64.5 keV Resonance Strength in the ^{17}O(p,γ)^{18}F Reaction.

Authors :
Gesuè RM
Ciani GF
Piatti D
Boeltzig A
Rapagnani D
Aliotta M
Ananna C
Barbieri L
Barile F
Bemmerer D
Best A
Broggini C
Bruno CG
Caciolli A
Campostrini M
Casaburo F
Cavanna F
Colombetti P
Compagnucci A
Corvisiero P
Csedreki L
Davinson T
De Gregorio GM
Dell'Aquila D
Depalo R
Di Leva A
Elekes Z
Ferraro F
Formicola A
Fülöp Z
Gervino G
Guglielmetti A
Gustavino C
Gyürky G
Imbriani G
Junker M
Lugaro M
Marigo P
Marsh J
Masha E
Menegazzo R
Mercogliano D
Paticchio V
Perrino R
Prati P
Rigato V
Robb D
Schiavulli L
Sidhu RS
Skowronski J
Straniero O
Szücs T
Zavatarelli S
Source :
Physical review letters [Phys Rev Lett] 2024 Aug 02; Vol. 133 (5), pp. 052701.
Publication Year :
2024

Abstract

The CNO cycle is one of the most important nuclear energy sources in stars. At temperatures of hydrostatic H-burning (20  MK<T<80  MK) the ^{17}O(p,γ)^{18}F reaction rate is dominated by the poorly constrained 64.5 keV resonance. Here, we report on the first direct measurements of its resonance strength and of the direct capture contribution at 142 keV, performed with a new high sensitivity setup at LUNA. The present resonance strength of ωγ_{(p,γ)}^{bare}=(30±6_{stat}±2_{syst})  peV is about a factor of 2 higher than the values in literature, leading to a Γ_{p}^{bare}=(34±7_{stat}±3_{syst})  neV, in agreement with the LUNA result from the (p,α) channel. Such agreement strengthens our understanding of the oxygen isotopic ratios measured in red giant stars and in O-rich presolar grains.

Details

Language :
English
ISSN :
1079-7114
Volume :
133
Issue :
5
Database :
MEDLINE
Journal :
Physical review letters
Publication Type :
Academic Journal
Accession number :
39159080
Full Text :
https://doi.org/10.1103/PhysRevLett.133.052701