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Arnold, R.; Augier, C.; Baker, J.; Barabash, A.S.; Bongrand, M.; Broudin, G.; Brudanin, V.; Caffrey, A.J.; Egorov, V.; Etienvre, A.I.; Fatemi-Ghomi, N.; Hubert, F.; Hubert, Ph; Jerie, J.; Jollet, C.; Jullian, S.; King, S.; Kochetov, O.; Konovalov, S.I.; Kovalenko, V.; Lalanne, D.; Lamhamdi, T.; Leccia, F.; Lemière, Y.; Longuemare, C.; Lutter, G.; Marquet, Ch; Mauger, F.; Nachab, A.; Ohsumi, H.; Perrot, F.; Piquemal, F.; Reyss, J.L.; Ricol, J.S.; Saakyan, R.; Sarazin, X.; Simard, L.; Šimkovic, F.; Shitov, Yu; Smolnikov, A.; Söldner-Rembold, S.; Štekl, I.; Suhonen, J.; Sutton, C.S.; Szklarz, G.; Thomas, J.; Timkin, V.; Tretyak, V.; Umatov, V.; Vála, L.; Vanyushin, I.; Vasiliev, V.; Vorobel, V.; Vylov, Ts
Nuclear physics. A, 2007, 2007-1-00, Letnik: 781, Številka: 1Journal Article
The double beta decay of 100Mo to the 0 1 + and 2 1 + excited states of 100Ru is studied using the NEMO 3 data. After the analysis of 8024 h of data the half-life for the two-neutrino double beta decay of 100Mo to the excited 0 1 + state is measured to be T 1 / 2 ( 2 ν ) = 5.7 −0.9 +1.3 ( stat. ) ± 0.8 ( syst. ) × 10 20 y . The signal-to-background ratio is equal to 3. Information about energy and angular distributions of emitted electrons is also obtained. No evidence for neutrinoless double beta decay to the excited 0 1 + state has been found. The corresponding half-life limit is T 1 / 2 ( 0 ν ) ( 0 + → 0 1 + ) > 8.9 × 10 22 y (at 90% C.L.). The search for the double beta decay to the 2 1 + excited state has allowed the determination of limits on the half-life for the two neutrino mode T 1 / 2 ( 2 ν ) ( 0 + → 2 1 + ) > 1.1 × 10 21 y (at 90% C.L.) and for the neutrinoless mode T 1 / 2 ( 0 ν ) ( 0 + → 2 1 + ) > 1.6 × 10 23 y (at 90% C.L.).
