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Direct measurement of the mass difference of $^{72}$As-$^{72}$Ge rules out $^{72}$As as a promising $\beta$-decay candidate to determine the neutrino mass

dc.contributor.authorGE, Z.
dc.contributor.authorERONEN, T.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorDE ROUBIN, A.
dc.contributor.authorNESTERENKO, D.A.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorHUKKANEN, M.
dc.contributor.authorBELIUSKINA, O.
dc.contributor.authorDE GROOTE, R.
dc.contributor.authorGELDHOF, S.
dc.contributor.authorGINS, W.
dc.contributor.authorKANKAINEN, A.
dc.contributor.authorKOSZORÚS, Á.
dc.contributor.authorKOTILA, J.
dc.contributor.authorKOSTENSALO, J.
dc.contributor.authorMOORE, I.D.
dc.contributor.authorRAGGIO, A.
dc.contributor.authorRINTA-ANTILA, S.
dc.contributor.authorSUHONEN, J.
dc.contributor.authorVIRTANEN, V.
dc.contributor.authorWEAVER, A.P.
dc.contributor.authorZADVORNAYA, A.
dc.contributor.authorJOKINEN, A.
dc.date.issued2021
dc.description.abstractEnWe report the first direct determination of the ground-state to ground-state electron-capture Q value for the As72 to Ge72 decay by measuring their atomic mass difference utilizing the double Penning trap mass spectrometer, JYFLTRAP. The Q value was measured to be 4343.596(75) keV, which is more than a fiftyfold improvement in precision compared to the value in the most recent Atomic Mass Evaluation 2020. Furthermore, the new Q value was found to be 12.4(40) keV (3.1 σ) lower. With the significant reduction of the uncertainty of the ground-state to ground-state Q value combined with the level scheme of Ge72 from γ-ray spectroscopy, we confirm that the five potential ultralow Q-value β+ decay or electron capture transitions are energetically forbidden, thus precluding all the transitions as possible candidates for the electron neutrino mass determination. However, the discovery of small negative Q values opens up the possibility to use As72 for the study of virtual β-γ transitions.
dc.language.isoen
dc.subject.enElectroweak Interaction
dc.subject.enSymmetries
dc.subject.enneutrino: mass
dc.subject.enmass: spectrometer
dc.subject.enelectron: capture
dc.subject.enenergy: ground state
dc.subject.ennuclide: mass difference
dc.subject.enPenning trap
dc.subject.enexperimental results
dc.subject.ennucleus: semileptonic decay
dc.subject.enenergy: transition
dc.subject.enexperimental methods
dc.title.enDirect measurement of the mass difference of $^{72}$As-$^{72}$Ge rules out $^{72}$As as a promising $\beta$-decay candidate to determine the neutrino mass
dc.typeArticle de revue
dc.identifier.doi10.1103/PhysRevC.103.065502
dc.subject.halPhysique [physics]/Physique Nucléaire Expérimentale [nucl-ex]
dc.identifier.arxiv2103.08729
bordeaux.journalPhys.Rev.C
bordeaux.page065502
bordeaux.volume103
bordeaux.issue6
bordeaux.peerReviewedoui
hal.identifierhal-03191148
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03191148v1
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