Observation of two neutrino double beta decay of 116Cd with the tracking detector NEMO-2
Arnold П., Augier С., Barabash A.S., Blum D., Brudanin V., Campagne J.E., Caurier E, Dassie D., Egorov V., Eschbach R., Guyonnet J.L., Hubert F., Hubert Ph., Jullian S., Kochetov O., Kornoukhov V.N., Kovalenko V., Lalanne D., Laplanche F., Leccia F., Lepikhin Yu.B., Linck I., Longuemare C., Mauger F., Mennrath P., Nicholson H.W., Nozdrin A., Piquemal F., Scheibling F., Sutton C.S., Szklarz G., Tretyak V.I., Umatov V.I., Vanushin I.A., Vareille A., Vassilyev Yu., Vylov Ts., Zerkin V.
The two neutrino double beta decay of Cd has been detected using a 152 g source of enriched cadmium. A signal-to-background ratio of 2.8 was achieved in a 2460 h run with the NEMO-2 detector. The corresponding half-life is Г* \3.6+°«/tatl ±0.3(svst)] · Ю19 y.