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

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

*Corresponding author for this work

Research output: Contribution to journalLetterpeer-review

Abstract

Neutron destruction reactions of the cosmic γ-ray emitter 26Al are of importance to determine the amount of 26Al ejected into our galaxy by supernova explosions and for 26Al production in asymptotic giant branch stars. We performed a new measurement of the 26Al (n,α) reaction up to 160-keV neutron energy at the neutron time-of-flight facilities n_TOF at CERN and GELINA at EC-JRC. We provide strengths for ten resonances, six of them for the first time. We use our data to calculate astrophysical reactivities for stellar temperatures up to 0.7 GK. Our results resolve a discrepancy between the two previous direct measurements of this reaction, and indicate higher stellar destruction rates than the most recently recommended reactivity.
Original languageEnglish
Article numberL032803
Pages (from-to)1-6
Number of pages6
JournalPhysical Review C
Volume104
Issue number3
DOIs
Publication statusPublished - 22 Sep 2021

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