0000000000887468

AUTHOR

Stefano Nisi

showing 2 related works from this author

Searches for neutrinoless resonant double electron captures at LNGS

2012

Several experiments were performed during last years at underground (3600 m w.e.) Laboratori Nazionali del Gran Sasso (LNGS) of the INFN (Italy) to search for resonant 2$\varepsilon0\nu$ captures in 96Ru, 106Cd, 136Ce, 156Dy, 158Dy, 180W, 184Os, 190Pt with the help of HP Ge semiconductor detectors, and ZnWO4 and 106CdWO4 crystal scintillators. No evidence for r-2$\varepsilon0\nu$ decays was found, and only T_{1/2} limits were established in the range of 10^{14}-10^{21} yr.

Physicsdouble beta decay; low background physics;HistoryRange (particle radiation)low background physicsdouble beta decayFOS: Physical sciencesElectronScintillatorComputer Science ApplicationsEducationSemiconductor detectorSettore FIS/04 - Fisica Nucleare e SubnucleareCrystalNuclear physicsNuclear Experiment (nucl-ex)Nuclear Experiment
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Evidence of Single State Dominance in the Two-Neutrino Double- β Decay of Se82 with CUPID-0

2019

We report on the measurement of the two-neutrino double-β decay of ^{82}Se performed for the first time with cryogenic calorimeters, in the framework of the CUPID-0 experiment. With an exposure of 9.95 kg yr of Zn^{82}Se, we determine the two-neutrino double-β decay half-life of ^{82}Se with an unprecedented precision level, T_{1/2}^{2ν}=[8.60±0.03(stat) _{-0.13}^{+0.19}(syst)]×10^{19}  yr. The very high signal-to-background ratio, along with the detailed reconstruction of the background sources allowed us to identify the single state dominance as the underlying mechanism of such a process, demonstrating that the higher state dominance hypothesis is disfavored at the level of 5.5σ.

PhysicsParticle physicsDouble beta decay0103 physical sciencesGeneral Physics and AstronomyNeutrino010306 general physics01 natural sciencesPhysical Review Letters
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