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dc.contributor.authorHaselschwardt, S. J.
dc.contributor.authorKostensalo, J.
dc.contributor.authorMougeot, X.
dc.contributor.authorSuhonen, J.
dc.date.accessioned2020-12-22T08:20:53Z
dc.date.available2020-12-22T08:20:53Z
dc.date.issued2020
dc.identifier.citationHaselschwardt, S. J., Kostensalo, J., Mougeot, X., & Suhonen, J. (2020). Improved calculations of β decay backgrounds to new physics in liquid xenon detectors. <i>Physical Review C</i>, <i>102</i>(6), Article 065501. <a href="https://doi.org/10.1103/PhysRevC.102.065501" target="_blank">https://doi.org/10.1103/PhysRevC.102.065501</a>
dc.identifier.otherCONVID_47391977
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/73378
dc.description.abstractWe present high-precision theoretical predictions for the electron energy spectra for the ground-state to ground-state β decays of 214Pb, 212Pb, and 85Kr most relevant to the background of liquid xenon dark matter detectors. The effects of nuclear structure on the spectral shapes are taken into account using large-scale shell-model calculations. Final spectra also include atomic screening and exchange effects. The impact of nuclear structure effects on the 214Pb and 212Pb spectra below ≈100 keV, pertinent for several searches for new physics, are found to be comparatively larger than those from the atomic effects alone. We find that the full calculation for 214Pb (212Pb) predicts 15.0%–23.2% (12.1%–19.0%) less event rate in a 1–15 keV energy region of interest compared to the spectrum calculated as an allowed transition when using values of the weak axial vector coupling in the range gA=0.7–1.0. The discrepancy highlights the importance of both a proper theoretical treatment and the need for direct measurements of these spectra for a thorough understanding of β decay backgrounds in future experiments.en
dc.format.mimetypeapplication/pdf
dc.languageeng
dc.language.isoeng
dc.publisherAmerican Physical Society (APS)
dc.relation.ispartofseriesPhysical Review C
dc.rightsCC BY 4.0
dc.subject.otherbeta decay
dc.subject.otherelectroweak interactions in nuclear physics
dc.subject.othernuclear structure and decays
dc.titleImproved calculations of β decay backgrounds to new physics in liquid xenon detectors
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-202012227320
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.type.coarhttp://purl.org/coar/resource_type/c_2df8fbb1
dc.description.reviewstatuspeerReviewed
dc.relation.issn2469-9985
dc.relation.numberinseries6
dc.relation.volume102
dc.type.versionpublishedVersion
dc.rights.copyright© 2020 the Authors
dc.rights.accesslevelopenAccessfi
dc.relation.grantnumber318043
dc.subject.ysoydinfysiikka
dc.subject.ysoilmaisimet
dc.subject.ysotaustasäteily
dc.format.contentfulltext
jyx.subject.urihttp://www.yso.fi/onto/yso/p14759
jyx.subject.urihttp://www.yso.fi/onto/yso/p4220
jyx.subject.urihttp://www.yso.fi/onto/yso/p8187
dc.rights.urlhttps://creativecommons.org/licenses/by/4.0/
dc.relation.doi10.1103/PhysRevC.102.065501
dc.relation.funderResearch Council of Finlanden
dc.relation.funderSuomen Akatemiafi
jyx.fundingprogramAcademy Project, AoFen
jyx.fundingprogramAkatemiahanke, SAfi
jyx.fundinginformationThis work was supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-05CH11231 and by the Academy of Finland under Project No. 318043. J.K. acknowledges the financial support from the Jenny and Antti Wihuri Foundation.
dc.type.okmA1


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