6533b7defe1ef96bd127686b

RESEARCH PRODUCT

Measurement of the two neutrino double beta decay half-life of Zr-96 with the NEMO-3 detector

V. G. EgorovX. SarazinF. PiquemalF. PiquemalT. LamhamdiA. Basharina-freshvilleA. NachabA. NachabY. LemièrePh. HubertFedor ŠImkovicChi-hung NguyenChi-hung NguyenChi-hung NguyenJuergen ThomasIgor NemchenokJ. BakerF. MamedovA. ChaponJ. ArgyriadesD. LalanneA. S. BarabashF. PerrotF. PerrotJouni SuhonenL. VálaS. JullianA. J. CaffreyN. Fatemi-ghomiV. I. UmatovC. S. SuttonG. SzklarzO.i. KochetovR. L. FlackV. B. BrudaninG. Broudin-bayK. LangS. Söldner-remboldV. I. TretyakV. I. TretyakYu. ShitovJ. L. ReyssGuillaume LutterGuillaume LutterS. W. SnowI. NastevaV. VasilievCh. MarquetCh. MarquetM. BongrandS. KingM. KauerR. B. PahlkaF. NovaP. NovellaJ. Martín-alboZ. DaraktchievaA. A. KlimenkoA.a. SmolnikovR. SaakyanV. V. TimkinI. VanyushinTs. VylovF. MaugerB. GuillonC. AugierC. LonguemareJ. S. RicolJ. S. RicolL. SimardH. OhsumiDominique DurandV. KovalenkoS. I. KonovalovE. ChauveauI. SteklVit VorobelR. Arnold

subject

PhysicsNuclear and High Energy PhysicsIsotope010308 nuclear & particles physicsDetectorFOS: Physical sciencesHalf-lifeElectron[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]7. Clean energy01 natural sciencesNuclear physicsRadioactivityAngular distributionDouble beta decay0103 physical sciencesNuclear Experiment (nucl-ex)Neutrino010306 general physicsNuclear ExperimentEnergy (signal processing)

description

Using 9.4 g of Zr-96 and 1221 days of data from the NEMO-3 detector corresponding to 0.031 kg yr, the obtained 2vbb decay half-life measurement is [2.35 +/- 0.14(stat) +/- 0.16(syst)] x 10^19 yr. Different characteristics of the final state electrons have been studied, such as the energy sum, individual electron energy, and angular distribution. The 2v nuclear matrix element is extracted using the measured 2vbb half-life and is 0.049 +/- 0.002. Constraints on 0vbb decay have also been set.

10.1016/j.nuclphysa.2010.07.009http://arxiv.org/abs/0906.2694