Destruction of the cosmic gamma-ray emitter Al-26 in massive stars: Study of the key Al-26(n, p) reaction
Metadatos
Mostrar el registro completo del ítemAutor
Lederer Woods, C.; Porras Sánchez, José Ignacio; Praena Rodríguez, Antonio Javier; TOF CollaborationEditorial
American Physical Society
Fecha
2021-08-30Referencia bibliográfica
Lederer-Woods, C... [et al.] (2021). Destruction of the cosmic ϒ-ray emitter 26Al in massive stars: study of the key 26Al (n, p) reaction. Physical Review C. [https://doi.org/10.1103/PhysRevC.104.L022803]
Patrocinador
Austrian Science Fund (FWF) J3503; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC) ST/L005824/1 ST/M006085/1; European Research Council (ERC); European Commission 677497Resumen
The Al-26(n, p) Mg-26 reaction is the key reaction impacting on the abundances of the cosmic gamma-ray emitter Al-26 produced in massive stars and impacts on the potential pollution of the early solar system with Al-26 by asymptotic giant branch stars. We performed a measurement of the Al-26(n, p) Mg-26 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.