Proton-capture rates on carbon isotopes and their impact on the astrophysical 12C/13C ratio

LUNA Collaboration, J. Skowronski, A Boeltzig*, G F Ciani, L. Csedreki, D Piatti, M. Aliotta, C. Ananna, F Barile, D Bemmerer, A Best, C Broggini, C. G. Bruno, A Caciolli, M. Campostrini, F Cavanna, P Colombetti, A. Compagnucci, P Corvisiero, T. DavinsonR Depalo, A Di Leva, Z Elekes, F Ferraro, A Formicola, Zs Fülop, G Gervino, R M Gesue, A Guglielmetti, C Gustavino, Gy Gyurky, G Imbriani, M Junker, M Lugaro, P Marigo, E Masha, R Menegazzo, V Paticchio, R Perrino, P Prati, D. Rapagnani, V. Rigato, L Schiavulli, R S Sidhu, O Straniero, T Szucs, S Zavatarelli

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

The 12C/13C ratio is a significant indicator of nucleosynthesis and mixing processes during hydrogen burning in stars. Its value mainly depends on the relative rates of the 12C\pg13N and 13C14N reactions. Both reactions have been studied at the Laboratory for Underground Nuclear Astrophysics (LUNA) in Italy down to the lowest energies to date (\Ecm=\SI60\kilo\electronvolt) reaching for the first time the high energy tail of hydrogen burning in the shell of giant stars. Our cross sections, obtained with both prompt γ-ray detection and activation measurements, are the most precise to date with overall systematic uncertainties of . Compared with most of the literature, our results are systematically lower, by for the 12C\pg13N reaction and by for 13C\pg14N. We provide the most precise value up to now of in the range for the lowest possible 12C/13C ratio that can be produced during H burning in giant stars.
Original languageEnglish
Article number162701
Pages (from-to)1-7
Number of pages7
JournalPhysical Review Letters
Issue number16
Publication statusPublished - 20 Oct 2023


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