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

Autori
Lederer-Woods, C. ; ... ; Bosnar, Damir ; ... ; Žugec, Petar

Kolaboracija
N_TOF Collaboration

Izvornik
Physical review. C (2469-9985) 104 (2021); L032803, 6

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, pismo, znanstveni

Ključne riječi
26Al(n, α) reaction, n_TOF, neutron time of flight, stellar nucleosynthesis

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA