6533b7dafe1ef96bd126ee25
RESEARCH PRODUCT
On the resonant neutrinoless double-electron-capture decay of ^{136}Ce
Ari JokinenAnu KankainenVeli KolhinenTommi EronenJuha ÄYstöJuho RissanenDmitry GorelovJouni SuhonenJani Hakalasubject
PhysicsNuclear and High Energy PhysicsIon beamta114Physics::Instrumentation and DetectorsQ valueElectron captureAstrophysics::High Energy Astrophysical PhenomenaHalf-lifePenning trapAtomic massNuclear physicsExcited stateAtomic physicsdescription
Abstract The double-electron-capture Q value for the 136Ce decay to 136Ba has been determined at JYFLTRAP. The measured value 2378.53(27) keV excludes the energy degeneracy with the 0 + excited state of the decay daughter 136Ba at 2315.32(7) keV in a resonant 0 ν ECEC decay by 11.67 keV. The new Q value differs from the old adopted value 2419(13) keV (Atomic Mass Evaluation 2003) by 40 keV and is 50 times more precise. Our calculations show that the precise Q value renders the resonant 0 ν ECEC decay of 136Ce undetectable by the future underground detectors. We measured also the double-β decay Q value of 136Xe to be 2457.86(48) keV which agrees well with the value 2457.83(37) keV measured at the Florida State University.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-02-01 | Physics Letters B |