Neutron spectroscopy of 26Mg states: Constraining the stellar neutron source 22Ne(α,n)25Mg

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

doi:10.1016/j.physletb.2017.02.025

Artículo

dc.creator	Massimi, C.	es
dc.creator	Altstadt, Sebastian G.	es
dc.creator	Andrzejewski, J.	es
dc.creator	Audouin, Laurent	es
dc.creator	Barbagallo, M.	es
dc.creator	Bécares, Vicente	es
dc.creator	Cortés Giraldo, Miguel Antonio	es
dc.creator	Praena Rodríguez, Javier	es
dc.creator	Quesada Molina, José Manuel	es
dc.creator	Sabaté Gilarte, Marta	es
dc.date.accessioned	2017-05-18T13:49:36Z
dc.date.available	2017-05-18T13:49:36Z
dc.date.issued	2017
dc.identifier.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.
dc.identifier.issn	0370-2693	es
dc.identifier.uri	http://hdl.handle.net/11441/60050
dc.description.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 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⊙	es
dc.format	application/pdf	es
dc.language.iso	eng	es
dc.publisher	Elsevier	es
dc.relation.ispartof	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 768, 1-6.
dc.rights	Attribution-NonCommercial-NoDerivatives 4.0 Internacional	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/4.0/	*
dc.title	Neutron spectroscopy of 26Mg states: Constraining the stellar neutron source 22Ne(α,n)25Mg	es
dc.type	info:eu-repo/semantics/article	es
dc.type.version	info:eu-repo/semantics/publishedVersion	es
dc.rights.accessRights	info:eu-repo/semantics/openAccess	es
dc.contributor.affiliation	Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear	es
dc.relation.publisherversion	10.1016/j.physletb.2017.02.025	es
dc.relation.publisherversion	http://dx.doi.org/10.1016/j.physletb.2017.02.025
dc.identifier.doi	10.1016/j.physletb.2017.02.025	es
idus.format.extent	6 p.	es
dc.journaltitle	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics	es
dc.publication.volumen	768	es
dc.publication.initialPage	1	es
dc.publication.endPage	6	es

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