S. Blondel

Search for neutrinoless double-beta decay of

We report the results of a search for the neutrinoless double-β decay (0νββ) of Mo100, using the NEMO-3 detector to reconstruct the full topology of the final state events. With an exposure of 34.7  kg·y, no evidence for the 0νββ signal has been found, yielding a limit for the light Majorana neutrino mass mechanism of T1/2(0νββ)>1.1×1024 years (90% C.L.) once both statistical and systematic uncertainties are taken into account. Depending on the nuclear matrix elements this corresponds to an upper limit on the Majorana effective neutrino mass of ⟨mν⟩<0.3–0.9  eV (90% C.L.). Constraints on other lepton number violating mechanisms of 0νββ decays are also given. Searching for high-energy double electron events in all suitable sources of the detector, no event in the energy region [3.2–10] MeV is observed for an exposure of 47  kg·y.

^{100}Mo

We report results from the NEMO-3 experiment based on an exposure of 1275 days with 661 g of (130)Te in the form of enriched and natural tellurium foils. The ββ decay rate of (130)Te is found to be greater than zero with a significance of 7.7 standard deviations and the half-life is measured to be T(½)(2ν) = [7.0 ± 0.9(stat) ± 1.1(syst)] × 10(20) yr. This represents the most precise measurement of this half-life yet published and the first real-time observation of this decay.

with the NEMO-3 detector

The NEMO-3 experiment at the Modane Underground Laboratory has investigated the double-

Measurement of the Double Beta Decay Half-life of 130Te with the NEMO-3 Detector

\beta

Measurement of the Double-Beta Decay Half-Life and Search for the Neutrinoless Double-Beta Decay of

decay of

^{48}{\rm Ca}

^{48}{\rm Ca}

with the NEMO-3 Detector

. Using

Measurement of the 2νββ decay half-life of 150Nd and a search for 0νββ decay processes with the full exposure from the NEMO-3 detector

5.25

Measurement of the ββ decay half-life of 130Te with the NEMO-3 detector.

yr of data recorded with a

Search for neutrinoless double-beta decay ofMo100with the NEMO-3 detector

6.99\,{\rm g}