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New limits on the β+EC and ECEC processes in 74Se and 120Te

dc.contributor.authorBARABASH, A.S.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorHUBERT, F.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorHUBERT, Ph.
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorNACHAB, A.
dc.contributor.authorUMATOV, V.
dc.date.issued2008
dc.date.conference2007-09-11
dc.description.abstractEnLimits on double-beta processes in 74Se and 120Te have been obtained using a 400 cm3 HPGe detector and an external source consisting of natural Se or TeO2 powder. In particular, limit with a 90% C.L. on the 74Se half-life of 5.5 × 1018 y for ECEC(0ν) transitions to the 2+2 excited state in 74Ge (1204.2 keV) has been obtained. This transition is discussed in association with a possible enhancement of the decay rate, in this case by several orders of magnitude, because the ECEC(0ν) process is nearly degenerate with an excited state in the daughter nuclide. For other β+ EC and ECEC transitions (to the ground and excited states) obtained limits are on the level ~ 1018 – 1019 y.
dc.language.isoen
dc.source.titleJournal of Physics: Conference Series
dc.title.enNew limits on the β+EC and ECEC processes in 74Se and 120Te
dc.typeCommunication dans un congrès
dc.identifier.doi10.1088/1742-6596/120/5/052057
dc.subject.halPhysique [physics]/Physique des Hautes Energies - Expérience [hep-ex]
dc.subject.halPhysique [physics]/Physique Nucléaire Expérimentale [nucl-ex]
bordeaux.page052057
bordeaux.volume120
bordeaux.countryJP
bordeaux.title.proceedingJournal of Physics: Conference Series
bordeaux.conference.citySendai
bordeaux.peerReviewedoui
hal.identifierin2p3-00396427
hal.version1
hal.invitednon
hal.proceedingsoui
hal.conference.end2007-09-15
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//in2p3-00396427v1
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