Investigation of double beta decay of $^{100}$Mo to excited states of $^{100}$Ru

R Arnold, S Blondel, F Mamedov,X Sarazin,J Mott,Rastislav Hodak,K Lang,N I Rukhadze, J Hůlka,A J Caffrey,V Kovalenko,A Chapon,G Eurin,L Simard, M Nomachi,V Vorobel,A Remoto,J J Evans,Jouni Suhonen,S Soldnerrembold,A žukauskas,V B Brudanin,O Kochetov,D Duchesneau,R B Pahlka,Ph Hubert,J Busto,V Egorov,Y Ramachers,I Stekl,G Szklarz,A A Klimenko,E N Rukhadze,J P Thomas, Y Lemiere,C Cerna,S Blot,Karel Smolek,V I Tretyak, G Warot,B Guillon,Ch Marquet,C Vilela,X Garrido, P Guzowski, L Dragounova,Z Liptak,V I Umatov,A Basharinafreshville,D Waters,B Soule,G Lutter,S Torre,Catherine L Riddle,E Chauveau,Yu A Shitov,R Saakyan,C S Sutton,Fedor Simkovic,A Smolnikov,A S Barabash,B Richards,I Nemchenok,P Loaiza,F Mauger,F Nowacki,R L Flack, J L Reyss,M Bongrand,H Ohsumi,D Lalanne,C Hugon,P Cermak,P Povinec,A Smetana,C Augier,S Jullian, S I Konovalov,F Perrot,D Durand,V Timkin,F Nova, Brent W Morgan,F Piquemal,H Gomez

NUCLEAR PHYSICS A（2014）

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摘要

Double beta decay of Mo-100 to the excited states of daughter nuclei has been studied using a 600 cm(3) low-background HPGe detector and an external source consisting of 2588 g of 97.5% enriched metallic (100)mo, which was formerly inside the NEMO-3 detector and used for the NEMO-3 measurements of Mo-100. The half-life for the two-neutrino double beta decay of Mo-100 to the excited 0(1)(+) state in Ru-100 is measured to be T-1/2 = [7.5 +/- 0.6(stat) +/- 0.6(syst)] . 10(20) yr. For other (0 nu + 2 nu) transitions to the 2(1)(+), 2(2)(+), 0(2)(+), 2(3)(+) and 0(3)(+) levels in Ru-100, limits are obtained at the level of similar to(0.25-1.1) . 10(22) yr. (C) 2014 Elsevier B.V. All rights reserved.

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关键词

Double beta decay,Mo-100,Excited states

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