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$^{159}$Dy electron-capture: a strong new candidate for neutrino mass determination

dc.contributor.authorGE, Z.
dc.contributor.authorERONEN, T.
dc.contributor.authorTYRIN, K.S.
dc.contributor.authorKOTILA, J.
dc.contributor.authorKOSTENSALO, J.
dc.contributor.authorNESTERENKO, D.A.
dc.contributor.authorBELIUSKINA, O.
dc.contributor.authorDE GROOTE, R.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorDE ROUBIN, A.
dc.contributor.authorGELDHOF, S.
dc.contributor.authorGINS, W.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorHUKKANEN, M.
dc.contributor.authorJOKINEN, A.
dc.contributor.authorKANKAINEN, A.
dc.contributor.authorKOSZORÚS, Á.
dc.contributor.authorKRIVORUCHENKO, M.I.
dc.contributor.authorKUJANPÄÄ, S.
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.date.issued2021
dc.identifier.issn0031-9007
dc.description.abstractEnThe ground state to ground state electron-capture <math display="inline"><mi>Q</mi></math> value of <math display="inline"><mrow><mmultiscripts><mrow><mi>Dy</mi></mrow><mprescripts/><none/><mrow><mn>159</mn></mrow></mmultiscripts></mrow></math> (<math display="inline"><mn>3</mn><mo stretchy="false">/</mo><msup><mn>2</mn><mo>-</mo></msup></math>) has been measured directly using the double Penning trap mass spectrometer JYFLTRAP. A value of 364.73(19) keV was obtained from a measurement of the cyclotron frequency ratio of the decay parent <math display="inline"><mrow><mmultiscripts><mrow><mi>Dy</mi></mrow><mprescripts/><none/><mrow><mn>159</mn></mrow></mmultiscripts></mrow></math> and the decay daughter <math display="inline"><mrow><mmultiscripts><mrow><mi>Tb</mi></mrow><mprescripts/><none/><mrow><mn>159</mn></mrow></mmultiscripts></mrow></math> ions using the novel phase-imaging ion-cyclotron resonance technique. The <math display="inline"><mi>Q</mi></math> values for allowed Gamow-Teller transition to <math display="inline"><mn>5</mn><mo stretchy="false">/</mo><msup><mn>2</mn><mo>-</mo></msup></math> and the third-forbidden unique transition to <math display="inline"><mn>11</mn><mo stretchy="false">/</mo><msup><mn>2</mn><mo>+</mo></msup></math> state with excitation energies of 363.5449(14) keV and 362.050(40) keV in <math display="inline"><mrow><mmultiscripts><mrow><mi>Tb</mi></mrow><mprescripts/><none/><mrow><mn>159</mn></mrow></mmultiscripts></mrow></math> were determined to be 1.18(19) keV and 2.68(19) keV, respectively. The high-precision <math display="inline"><mi>Q</mi></math> value of transition <math display="inline"><mn>3</mn><mo stretchy="false">/</mo><msup><mn>2</mn><mo>-</mo></msup><mo stretchy="false">→</mo><mn>5</mn><mo stretchy="false">/</mo><msup><mn>2</mn><mo>-</mo></msup></math> from this work, revealing itself as the lowest electron-capture <math display="inline"><mi>Q</mi></math> value, is used to unambiguously characterize all the possible lines that are present in its electron-capture spectrum. We performed atomic many-body calculations for both transitions to determine electron-capture probabilities from various atomic orbitals and found an order of magnitude enhancement in the event rates near the end point of energy spectrum in the transition to the <math display="inline"><mn>5</mn><mo stretchy="false">/</mo><msup><mn>2</mn><mo>-</mo></msup></math> nuclear excited state, which can become very interesting once the experimental challenges of identifying decays into excited states are overcome. The transition to the <math display="inline"><mn>11</mn><mo stretchy="false">/</mo><msup><mn>2</mn><mo>+</mo></msup></math> state is strongly suppressed and found unsuitable for measuring the neutrino mass. These results show that the electron-capture in the <math display="inline"><mrow><mmultiscripts><mrow><mi>Dy</mi></mrow><mprescripts/><none/><mrow><mn>159</mn></mrow></mmultiscripts></mrow></math> atom, going to the <math display="inline"><mn>5</mn><mo stretchy="false">/</mo><msup><mn>2</mn><mo>-</mo></msup></math> state of the <math display="inline"><mrow><mmultiscripts><mrow><mi>Tb</mi></mrow><mprescripts/><none/><mrow><mn>159</mn></mrow></mmultiscripts></mrow></math> nucleus, is a new candidate that may open the way to determine the electron-neutrino mass in the sub-eV region by studying electron-capture. Further experimental feasibility studies, including coincidence measurements with realistic detectors, will be of great interest.
dc.language.isoen
dc.publisherAmerican Physical Society
dc.subject.enneutrino: mass
dc.subject.enelectron: capture
dc.subject.enmass: scale
dc.subject.enenergy: decay
dc.subject.endysprosium
dc.subject.enPenning trap
dc.subject.ensemileptonic decay
dc.subject.ensensitivity
dc.subject.enexperimental results
dc.title.en$^{159}$Dy electron-capture: a strong new candidate for neutrino mass determination
dc.typeArticle de revue
dc.identifier.doi10.1103/PhysRevLett.127.272301
dc.subject.halPhysique [physics]/Physique Nucléaire Expérimentale [nucl-ex]
dc.identifier.arxiv2106.06626
bordeaux.journalPhysical Review Letters
bordeaux.page272301
bordeaux.volume127
bordeaux.issue27
bordeaux.peerReviewedoui
hal.identifierhal-03271133
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03271133v1
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