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Investigation of double beta decay of 100Mo to excited states of 100Ru

R. Arnold 1 C. Augier 2 A.S. Barabash A. Basharina-Freshville S. Blondel 2 S. Blot M. Bongrand 2 V. Brudanin J. Busto 3 A.J. Caffrey P. Čermák C. Cerna 4 A. Chapon 5 E. Chauveau L. Dragounová D. Duchesneau 6 D. Durand 5 V. Egorov G. Eurin 2 J.J. Evans R. Flack X. Garrido 2 H. Gómez 2 B. Guillon 5 P. Guzowski R. Hodák P. Hubert 7 C. Hugon 7 J. Hůlka Sophie Jullian 2 A. Klimenko O. Kochetov S.I. Konovalov V. Kovalenko D. Lalanne 2 K. Lang Y. Lemière 5 Z. Liptak P. Loaiza 8 G. Lutter 7 F. Mamedov Catherine Marquet 4 F. Mauger 5 B. Morgan J. Mott I. Nemchenok M. Nomachi F. Nova F. Nowacki 1 H. Ohsumi R.B. Pahlka F. Perrot 4 F. Piquemal 8, 7 P. Povinec Y.A. Ramachers A. Remoto 6 J.L. Reyss 9, 10 B. Richards C.L. Riddle E. Rukhadze N. Rukhadze R. Saakyan X. Sarazin 2 Yu. Shitov L. Simard 2 F. Šimkovic A. Smetana K. Smolek A. Smolnikov S. Söldner-Rembold B. Soulé 7 I. Štekl J. Suhonen C.S. Sutton G. Szklarz 2 J. Thomas V. Timkin S. Torre V.I. Tretyak Vl.I. Tretyak V. Umatov C. Vilela V. Vorobel G. Warot 8 D. Waters A. Žukauskas
Abstract : Double beta decay of 100Mo to the excited states of daughter nuclei has been studied using a 600 cm3 low-background HPGe detector and an external source consisting of 2588 g of 97.5% enriched metallic 100Mo, which was formerly inside the NEMO-3 detector and used for the NEMO-3 measurements of 100Mo. The half-life for the two-neutrino double beta decay of 100Mo to the excited View the MathML source01+ state in 100Ru is measured to be T1/2=[7.5±0.6(stat)±0.6(syst)]⋅1020 yrT1/2=[7.5±0.6(stat)±0.6(syst)]⋅1020 yr. For other (0ν+2ν)(0ν+2ν) transitions to the View the MathML source21+, View the MathML source22+, View the MathML source02+, View the MathML source23+ and View the MathML source03+ levels in 100Ru, limits are obtained at the level of ∼(0.25-1.1)⋅1022 yr∼(0.25-1.1)⋅1022 yr.
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R. Arnold, C. Augier, A.S. Barabash, A. Basharina-Freshville, S. Blondel, et al.. Investigation of double beta decay of 100Mo to excited states of 100Ru. Nuclear Physics A, Elsevier, 2014, 925, pp.25-36. ⟨10.1016/j.nuclphysa.2014.01.008⟩. ⟨in2p3-00951921⟩

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