Destruction of the cosmic ¿ -ray emitter Al 26 in massive stars: Study of the key Al 26 (n,p) reaction
The 26 Al ( n , p ) 26 Mg reaction is the key reaction impacting on the abundances of the cosmic ¿ -ray emitter 26 Al produced in massive stars and impacts on the potential pollution of the early solar system with 26 Al by asymptotic giant branch stars. We performed a measurement of the 26 Al ( n ,...
| Authors: | , , , , , , , , , , , , , |
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| Format: | article |
| Publication Date: | 2021 |
| Country: | España |
| Institution: | Universitat Politècnica de Catalunya (UPC) |
| Repository: | UPCommons. Portal del coneixement obert de la UPC |
| Language: | English |
| OAI Identifier: | oai:upcommons.upc.edu:2117/361121 |
| Online Access: | https://hdl.handle.net/2117/361121 https://dx.doi.org/10.1103/PhysRevC.104.L022803 |
| Access Level: | Open access |
| Keyword: | Stellar activity Nuclear astrophysics Nuclear reactions Nucleosynthesis in explosive environments Resonance reactions Activitat estelar Àrees temàtiques de la UPC::Física::Astronomia i astrofísica |
| Summary: | The 26 Al ( n , p ) 26 Mg reaction is the key reaction impacting on the abundances of the cosmic ¿ -ray emitter 26 Al produced in massive stars and impacts on the potential pollution of the early solar system with 26 Al by asymptotic giant branch stars. We performed a measurement of the 26 Al ( n , p ) 26 Mg 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. |
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