Article
Neutron spectroscopy of 26Mg states: Constraining the stellar neutron source 22Ne(α,n)25Mg
Author/s | Massimi, C.
Altstadt, Sebastian G. Andrzejewski, J. Audouin, Laurent Barbagallo, M. Bécares, Vicente Cortés Giraldo, Miguel Antonio ![]() ![]() ![]() ![]() ![]() ![]() ![]() Praena Rodríguez, Javier Quesada Molina, José Manuel ![]() ![]() ![]() ![]() ![]() ![]() ![]() Sabaté Gilarte, Marta |
Department | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear |
Date | 2017 |
Published in |
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Abstract | This work reports on accurate, high-resolution measurements of the 25Mg(n,γ)26Mg and 25Mg(n,tot) cross sections in the neutron energy range from thermal to about 300 keV, leading to a significantly improved 25Mg(n,γ)26Mg ... This work reports on accurate, high-resolution measurements of the 25Mg(n,γ)26Mg and 25Mg(n,tot) cross sections in the neutron energy range from thermal to about 300 keV, leading to a significantly improved 25Mg(n,γ)26Mg parametrization. The relevant resonances for n+25Mg were characterized from a combined R-matrix analysis of the experimental data. This resulted in an unambiguous spin/parity assignment of the corresponding excited states in 26Mg. With this information experimental upper limits of the reaction rates for 22Ne(α,n)25Mg and 22Ne(α,γ)26Mg were established, potentially leading to a significantly higher (α,n)/(α,γ) ratio than previously evaluated. The impact of these results has been studied for stellar models in the mass range 2 to 25 M⊙ |
Citation | Massimi, C., Altstadt, S.G., Andrzejewski, J., Audouin, L., Barbagallo, M., Bécares, V.,...,Sabaté Gilarte, M. (2017). Neutron spectroscopy of 26Mg states: Constraining the stellar neutron source 22Ne(α,n)25Mg. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 768, 1-6. |
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