Destruction of the cosmic γ-ray emitter 26Al in massive stars: Study of the key 26Al(n, α) reaction
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AuthorLederer Woods, C.; Porras Sánchez, José Ignacio; Praena Rodríguez, Antonio Javier; TOF Collaboration
American Physical Society
C. Lederer Woods... [et al.]. Destruction of the cosmic γ-ray emitter 26Al in massive stars: Study of the key 26Al(n, α) reaction. PHYSICAL REVIEW C 104, L032803 (2021). [https://doi.org/10.1103/PhysRevC.104.L032803]
SponsorshipAustrian Science Fund (FWF) J3503; JRCIRMM through the EUFRAT Program; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC) ST/L005824/1 ST/M006085/1; European Research Council (ERC); European Commission 677497; Cost Action "ChETEC" CA16117
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.