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. Dominique 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 , C. 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

1 IPHC - Institut Pluridisciplinaire Hubert Curien
2 LAL - Laboratoire de l'Accélérateur Linéaire
3 CPPM - Centre de Physique des Particules de Marseille
4 NEMO - Neutrino et Faibles Radioactivités
5 LPCC - Laboratoire de physique corpusculaire de Caen
6 LAPP - Laboratoire d'Annecy de Physique des Particules
7 CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan
8 LSM - UMR 6417 - Laboratoire Souterrain de Modane
9 LSCE - Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette]
10 OCEANIS - Océan et Interfaces

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.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

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, 2014, 925, pp.25-36. ⟨10.1016/j.nuclphysa.2014.01.008⟩. ⟨in2p3-00951921⟩