C. Lederer-Woods, P. Woods, T. Davinson, D. Kahl, S. J. Lonsdale, M. Bacak, E. Griesmayer, E. Jericha, P. Kavrigin, H. Leeb, C. Weiß, -. n_TOF Collaboration et al.:
"Destruction of the cosmic #gamm-ray emitter 26Al in massive stars: Study of the key 26Al(n,p) reaction";
Physical Review C, 104 (2021), L022803; S. 1 - 7.

Kurzfassung englisch:
The 26Al(n,p)26Mg reaction is the key reaction impacting on the abundances of the cosmic γ-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-flux beam line EAR-2 at the n_TOF facility (CERN). We report resonance strengths for eleven resonances, nine being measured for the first time, while there is only 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, which is sufficient for a reliable determination of astrophysical reactivities up to 0.5 GK stellar temperature.

Nuclear astrophysics; Nuclear reactions; Neutron induced nuclear reactions; Nucleosynthesis in explosive environments; Resonance reactions; 20 <= A <= 38; Time-of-flight neutron spectroscopy

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