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dc.contributor.authorCanete, Laetitia
dc.contributor.authorDoherty, Daniel
dc.contributor.authorLotay, Gavin
dc.contributor.authorSeweryniak, Dariusz
dc.contributor.authorCampbell, Chris
dc.contributor.authorCarpenter, Michael Patten
dc.contributor.authorCatford, Wilton
dc.contributor.authorChipps, Kelly A.
dc.contributor.authorHenderson, Jack
dc.contributor.authorIzzard, Robert
dc.contributor.authorJanssens, Robert
dc.contributor.authorJayatissa, Heshani
dc.contributor.authorJosé Pont, Jordi
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Física
dc.date.accessioned2023-12-19T18:26:00Z
dc.date.available2023-12-19T18:26:00Z
dc.date.issued2023-09-14
dc.identifier.citationCanete, L. [et al.]. Confirmation of a new resonance in Si 26 and contribution of classical novae to the galactic abundance of Al 26. "Physical review C", 14 Setembre 2023, vol. 108, núm. 35807.
dc.identifier.issn2469-9993
dc.identifier.urihttp://hdl.handle.net/2117/398352
dc.description.abstractThe 25Al(p,¿) reaction has long been highlighted as a possible means to bypass the production of 26Al cosmic ¿ rays in classical nova explosions. However, uncertainties in the properties of key resonant states in 26Si have hindered our ability to accurately model the influence of this reaction in such environments. We report on a detailed ¿-ray spectroscopy study of 26Si and present evidence for the existence of a new, likely l=1, resonance in the 25Al + p system at Er=153.9(15) keV. This state is now expected to provide the dominant contribution to the 25Al(p,¿) stellar reaction rate over the temperature range, T˜0.1-0.2 GK. Despite a significant increase in the rate at low temperatures, we find that the final ejected abundance of 26Al from classical novae remains largely unaffected even if the reaction rate is artificially increased by a factor of 10. Based on new, galactic chemical evolution calculations, we estimate that the maximum contribution of novae to the observed galactic abundance of 26Al is ˜0.2M¿. Finally, we briefly highlight the important role that super-asymptotic giant branch stars may play in the production of 26Al.
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectÀrees temàtiques de la UPC::Física
dc.subject.lcshNuclear Physics
dc.subject.otherNucleosynthesis in explosive environments
dc.subject.otherSpectrometers & spectroscopic techniques
dc.subject.otherNuclear Physics
dc.titleConfirmation of a new resonance in Si 26 and contribution of classical novae to the galactic abundance of Al 26
dc.typeArticle
dc.subject.lemacFísica nuclear
dc.contributor.groupUniversitat Politècnica de Catalunya. GAA - Grup d'Astronomia i Astrofísica
dc.identifier.doi10.1103/PhysRevC.108.035807
dc.relation.publisherversionhttps://journals.aps.org/prc/abstract/10.1103/PhysRevC.108.035807
dc.rights.accessOpen Access
local.identifier.drac37175657
dc.description.versionPostprint (published version)
local.citation.authorCanete, L.; Doherty, D.; Lotay, G.; Seweryniak, D.; Campbell, C.; Carpenter, M.; Catford, W.; Chipps, K.; Henderson, J.; Izzard, R.; Janssens, R.; Jayatissa, H.; Jose, J.
local.citation.publicationNamePhysical review C
local.citation.volume108
local.citation.number035807


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