Destruction of the cosmic ϒ-ray emitter 26Al in massive stars: Study of the key 26Al(n,p) reaction

n_TOF Collaboration, C. Lederer-Woods*, P. J. Woods, T. Davinson, D Kahl, S.J. Lonsdale

*Corresponding author for this work

Research output: Contribution to journalLetterpeer-review

Abstract

The 26Al(n,p)26Mg reaction is the key reaction impacting on the abundances of the cosmic ϒ-ray emitter 26Al produced in massive stars and impacts on the potential pollution of the early solar system with 26Al by Asymptotic Giant Branch stars. We performed a measurement of the 26Al(n,p)26Mg cross section at the high ux beam line EAR-2 at the n TOF facility (CERN). We report resonance strengths for 11 resonances, 9 being measured for the first time, while there isonly one previous measurement for the other two. Our resonance strengths are significantly lower than the only previous values available. Our cross section data range to 150 keV neutron energy, sufficient for a reliable determination of astrophysical reactivities up to 0.5 GK stellar temperature.
Original languageEnglish
Article numberL022803
Pages (from-to)1-7
Number of pages7
JournalPhysical Review C
Volume104
Issue number2
DOIs
Publication statusPublished - 30 Aug 2021

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