$^{100}$Mo, 3.85 years 10000 20000 30000 40000 50000 60000 70000 0 0.5 1 1.5 2 2.5 3 3.5 E$_{TOT}$ (MeV) N events / 0.1 MeV Data 724486 evts 2 $^{100}$Mo Radon internal BKG 0 $^{100}$Mo $^{82}$Se, 3.85 years 200 400 600 800 1000 1200 1400 0 0.5 1 1.5 2 2.5 3 3.5 E$_{TOT}$ (MeV) N events / 0.1 MeV Data 15796 evts 2 $^{82}$Se Radon internal BKG external BKG MC Total 0 $^{82}$Se $^{100}$Mo, 3.85 years 1 10 10 2 10 3 10 4 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6 E$_{TOT}$ (MeV) N events / 0.1 MeV Data 2 $^{100}$Mo Radon internal BKG 0 $^{100}$Mo $^{82}$Se, 3.85 years 1 10 10 2 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6 E$_{TOT}$ (MeV) N events / 0.1 MeV Data 2 $^{82}$Se Radon internal BKG external BKG 0 $^{82}$Se FIG. 2: Distribution of the energy sum of two electrons for $^{100}$Mo (left) and $^{82}$Se (right), 1409 d data. The shape of a hypothetical 0 ν signal is shown by the curve in arbitrary units. FIG. 3: Distribution of the energy sum of two electrons in the region around Q$_{ββ}$ value for $^{100}$Mo (left) and $^{82}$Se (right), 1409 d data. High energy tail of the energy sum distribution for events in molybdenum (left) and selenium (right) foils are shown with black points. The background contributions are shown within the histogram. The shape of a hypothetical 0 ν signal is shown by the curve in arbitrary units. corresponds to the neutrino mass interval 〈 m$_{ν}$ 〉 < 0.45 – 0.93 eV. It is less restrictive for $^{82}$Se 〈 m$_{ν}$ 〉 < 0.89 – 2.43 eV. The reached NEMO 3 sensitivity on the neutrino mass is close to that of IGEX [20], the Heidelberg-Moscow collaboration [21] and CUORICINO [22]. 8