6533b82bfe1ef96bd128d62c
RESEARCH PRODUCT
Resonant enhancement of neutrinoless double-electron capture in 152Gd.
H.-j. KlugeSergey EliseevLutz SchweikhardC. DroeseKlaus BlaumKai ZuberN. A. ZubovaM. I. KrivoruchenkoFedor ŠImkovicFedor ŠImkovicF. HerfurthI. I. TupitsynV. M. ShabaevYu. N. NovikovE. Minaya RamirezC. RouxMichael Blocksubject
PhysicsNuclear physicsRare earth nucleiMassless particleParticle physicsElectron captureDouble beta decayGeneral Physics and AstronomyElementary particleFermionNeutrinoLeptondescription
In the search for the nuclide with the largest probability for neutrinoless double-electron capture, we have determined the ${Q}_{ϵϵ}$ value between the ground states of $^{152}\mathrm{Gd}$ and $^{152}\mathrm{Sm}$ by Penning-trap mass-ratio measurements. The new ${Q}_{ϵϵ}$ value of 55.70(18) keV results in a half-life of ${10}^{26}\text{ }\text{ }\mathrm{yr}$ for a 1 eV neutrino mass. With this smallest half-life among known $0\ensuremath{\nu}ϵϵ$ transitions, $^{152}\mathrm{Gd}$ is a promising candidate for the search for neutrinoless double-electron capture.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-12-14 | Physical review letters |