Search for the γ decay of the narrow near-threshold proton resonance in 11B

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dc.contributor.authorBottoni, Simone
dc.contributor.authorCorbari, G
dc.contributor.authorLeoni, S
dc.contributor.authorFornal, B
dc.contributor.authorGoasduff, A
dc.contributor.authorCapra, S
dc.contributor.authorMengoni, D
dc.contributor.authorAlbanese, E
dc.contributor.authorZiliani, S
dc.contributor.authorDueñas Díaz, José Antonio
dc.date.accessioned2024-07-16T08:45:01Z
dc.date.available2024-07-16T08:45:01Z
dc.date.issued2024
dc.description.abstractThe γ decay of the elusive narrow, near-threshold proton resonance in 11B was investigated at Laboratori Nazionali di Legnaro (INFN) in a particle-γ coincidence experiment, using the 6Li(6Li,pγ) fusion-evaporation reaction and the GALILEO-GALTRACE setup. No clear signature was found for a possible E1 decay to the 1/2 , first-excited state of 11B, predicted by the Shell Model Embedded in the Continuum (SMEC) with a branching of with respect to the dominant particle-decaying modes. The statistical analysis of the γ-ray spectrum provided an average upper limit of for this γ-ray branching, with a global significance of 5σ. On the other hand, by imposing a global confidence level of 3σ, a significant excess of counts was observed for E keV, corresponding to a resonance energy of 11429(20) keV (namely 200(20) keV above the proton separation energy of 11B) and a γ-ray branching of . This result is compatible with the SMEC calculations, potentially supporting the existence of a near-threshold proton resonance in 11B.es_ES
dc.description.departmentCiencias Integradas
dc.description.sponsorshipThis work was supported by the Italian Istituto Nazionale di Fisica Nucleare, the Polish National Science Centre, Poland under research project No. 2020/39/D/ST2/03443 , the PRIN2017 call for funding, under the project 2017P8KMFT CTADIR from the Italian Ministry of Education, University and Research, the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, grant no. 2020R1A6A3A03039081 , the MCIN/AEI/10.13039/501100011033, Spain with grant PID2020-118265GB-C42 , by Generalitat Valenciana, Spain with grant CIAPOS/2021/114 and by the EU FEDER funds.es_ES
dc.identifier.citationBottoni, S., Corbari, G., Leoni, S., Fornal, B., Goasduff, A., Capra, S., Mengoni, D., Albanese, E., Ziliani, S., Benzoni, G., Sánchez-Benítez, A. M., Bracco, A., Brugnara, D., Camera, F., Ciemała, M., Cieplicka-Oryńczak, N., Crespi, F. C. L., Dueñas, J. A., Gadea, A., … Zhang, G. (2024). Search for the γ decay of the narrow near-threshold proton resonance in 11B. In Physics Letters B (Vol. 855, p. 138851). Elsevier BV. https://doi.org/10.1016/j.physletb.2024.138851es_ES
dc.identifier.doi10.1016/j.physletb.2024.138851
dc.identifier.issn0370-2693
dc.identifier.issn1873-2445 (electrónico)
dc.identifier.urihttps://hdl.handle.net/10272/24059
dc.language.isoenges_ES
dc.publisherElsevieres_ES
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.rights.accessRightsopen accesses_ES
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/*
dc.subject.other11Bes_ES
dc.subject.otherNear-threshold resonancees_ES
dc.subject.otherγ-ray decayes_ES
dc.subject.otherContinuum shell modeles_ES
dc.subject.unesco2207 Física Atómica y Nucleares_ES
dc.titleSearch for the γ decay of the narrow near-threshold proton resonance in 11Bes_ES
dc.typejournal articlees_ES
dc.type.hasVersionVoRes_ES
dspace.entity.typePublication
relation.isAuthorOfPublication854844f4-bf6d-4e0b-b47d-c983969289be
relation.isAuthorOfPublication.latestForDiscovery854844f4-bf6d-4e0b-b47d-c983969289be

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