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dc.contributor.authorHayen, L.
dc.contributor.authorKostensalo, J.
dc.contributor.authorSeverijns, N.
dc.contributor.authorSuhonen, J.
dc.date.accessioned2019-11-26T09:51:52Z
dc.date.available2019-11-26T09:51:52Z
dc.date.issued2019
dc.identifier.citationHayen, L., Kostensalo, J., Severijns, N., & Suhonen, J. (2019). First-forbidden transitions in the reactor anomaly. <i>Physical Review C</i>, <i>100</i>(5), Article 054323. <a href="https://doi.org/10.1103/PhysRevC.100.054323" target="_blank">https://doi.org/10.1103/PhysRevC.100.054323</a>
dc.identifier.otherCONVID_33609374
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/66520
dc.description.abstractWe describe here microscopic calculations performed on the dominant forbidden transitions in reactor antineutrino spectra above 4 MeV using the nuclear shell model. By taking into account Coulomb corrections in the most complete way, we calculate the shape factor with the highest fidelity and show strong deviations from allowed approximations and previously published results. Despite small differences in the ab initio electron cumulative spectra, large differences on the order of several percent are found in the antineutrino spectra. Based on the behavior of the numerically calculated shape factors we propose a parametrization of forbidden spectra. Using Monte Carlo techniques we derive an estimated spectral correction and uncertainty due to forbidden transitions. We establish the dominance and importance of forbidden transitions in both the reactor anomaly and spectral shoulder analysis with their respective uncertainties. Based on these results, we conclude that a correct treatment of forbidden transitions is indispensable in both the normalization anomaly and spectral shoulder.en
dc.format.mimetypeapplication/pdf
dc.languageeng
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.ispartofseriesPhysical Review C
dc.rightsIn Copyright
dc.subject.otherbeta decay
dc.subject.otherelectroweak interactions in nuclear physics
dc.subject.otherfission
dc.subject.otherneutrino interactions
dc.subject.othernuclear reactors
dc.subject.othershell model
dc.titleFirst-forbidden transitions in the reactor anomaly
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201911265008
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.description.reviewstatuspeerReviewed
dc.relation.issn2469-9985
dc.relation.numberinseries5
dc.relation.volume100
dc.type.versionpublishedVersion
dc.rights.copyright© American Physical Society, 2019
dc.rights.accesslevelopenAccessfi
dc.relation.grantnumber318043
dc.subject.ysoydinfysiikka
dc.subject.ysohiukkasfysiikka
dc.format.contentfulltext
jyx.subject.urihttp://www.yso.fi/onto/yso/p14759
jyx.subject.urihttp://www.yso.fi/onto/yso/p15576
dc.rights.urlhttp://rightsstatements.org/page/InC/1.0/?language=en
dc.relation.doi10.1103/PhysRevC.100.054323
dc.relation.funderSuomen Akatemiafi
dc.relation.funderAcademy of Finlanden
jyx.fundingprogramAkatemiahanke, SAfi
jyx.fundingprogramAcademy Project, AoFen
jyx.fundinginformationThis work has been partly funded by the Belgian Federal Science Policy Office, under Contract No. IUAP EP/12-c, and the Fund for Scientific Research Flanders (FWO). This work has been partially supported by the Academy of Finland under Academy Project No. 318043. J.K. acknowledges the financial support from the Jenny and Antti Wihuri Foundation.


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