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28 March 2024
 
  » arxiv » hep-ex/0609058

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Measurement of double beta decay of 100Mo to excited states in the NEMO 3 experiment
R.Arnold ; C.Augier ; J.Baker ; A.S.Barabash ; M.Bongrand ; G.Broudin ; V.Brudanin ; A.J.Caffrey ; V.Egorov ; A.I.Etienvre ; N.Fatemi-Ghomi ; F.Hubert ; Ph.Hubert ; J.Jerie ; C.Jollet ; S.Jullian ; S.King ; O.Kochetov ; S.I.Konovalov ; V.Kovalenko ; D.Lalanne ; T.Lamhamdi ; F.Leccia ; Y.Lemi`ere ; C.Longuemare ; G.Lutter ; Ch.Marquet ; F.Mauger ; A.Nachab ; H.Ohsumi ; F.Perrot ; F.Piquemal ; J.L.Reyss ; J.S.Ricol ; R.Saakyan ; X.Sarazin ; L.Simard ; F.Simkovic ; Yu.Shitov ; A.Smolnikov ; S.S"oldner-Rembold ; I.Stekl ; J.Suhonen ; C.S.Sutton ; G.Szklarz ; J.Thomas ; V.Timkin ; V.Tretyak ; V.Umatov ; L.V’ala ; I.Vanyushin ; V.Vasiliev ; V.Vorobel ; Ts.Vylov ;
Date 29 Sep 2006
AbstractThe 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^(2nu)_1/2 = [5.7^{+1.3}_{-0.9}(stat)+/-0.8(syst)]x 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^(0nu)_1/2(0^+ --> 0^+_1) > 8.9 x 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^(2nu)_1/2(0^+ --> 2^+_1) > 1.1 x 10^21 y (at 90% C.L.) and for the neutrinoless mode T^(0nu)_1/2(0^+ --> 2^+_1) > 1.6 x 10^23 y (at 90% C.L.).
Source arXiv, hep-ex/0609058
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