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1. Quenching of gA deduced from the β-spectrum shape of 113Cd measured with the COBRA experiment

Author

E. Rukhadze, Juliane Volkmer, Christian Nitsch, I. Stekl, Julia Küttler, Yingjie Chu, R. Hodák, Kevin Kröninger, J. Tebrügge, R. Temminghoff, Thomas Quante, Claus Gößling, S. Zatschler, Kai Zuber, D. Gehre, Arne Heimbold, Jouni Suhonen, Christian Herrmann, Joel Kostensalo, and Lucas Bodenstein-Dresler

Subjects
Physics, Nuclear and High Energy Physics, Quenching (fluorescence), Coupling strength, 010308 nuclear & particles physics, Spectrum (functional analysis), Context (language use), 01 natural sciences, Spectral line, lcsh:QC1-999, Semiconductor detector, 0103 physical sciences, Atomic physics, 010306 general physics, Nuclear Experiment, lcsh:Physics
Abstract

A dedicated study of the quenching of the weak axial-vector coupling strength $g_{\rm A}$ in nuclear processes has been performed by the COBRA collaboration. This investigation is driven by nuclear model calculations which show that the $\beta$-spectrum shape of the fourfold forbidden non-unique decay of $^{113}$Cd strongly depends on the effective value of $g_{\rm A}$. Using an array of CdZnTe semiconductor detectors, 45 independent $^{113}$Cd spectra were obtained and interpreted in the context of three nuclear models. The resulting effective mean values are $\bar{g}_{\rm A}(\text{ISM}) = 0.915 \pm 0.007$, $\bar{g}_{\rm A}(\text{MQPM}) = 0.911 \pm 0.013$ and $\bar{g}_{\rm A}(\text{IBFM-2}) = 0.955 \pm 0.022$. These values agree well within the determined uncertainties and deviate significantly from the free value of $g_{\rm A}$. This can be seen as a first step towards answering the long-standing question regarding quenching effects related to $g_{\rm A}$ in low-energy nuclear processes., Comment: 12 pages, 11 figures

Published
2020

2. Search for the double-beta decay of 82Se to the excited states of 82Kr with NEMO-3

Author

F. Nova, Vit Vorobel, B. Morgan, C. L. Riddle, A. Smetana, Jose Busto, P. Guzowski, Y. Lemière, A. Remoto, A. Chapon, R. Breier, P. Loaiza, A. Basharina-Freshville, F. Xie, Yu. Shitov, J. C. Thomas, J. K. Sedgbeer, A.A. Smolnikov, Y. A. Ramachers, C. Cerna, M. Macko, A. Minotti, X. Sarazin, E. Chauveau, V.E. Kovalenko, Pavel P. Povinec, F. Mauger, G. Eurin, B. Richards, G. Szklarz, F. Perrot, Vl. I. Tretyak, O.I. Kochetov, C. Augier, H. Tedjditi, M. Cascella, S. Blot, S. Blondel, J.P. Cesar, S. Torre, B. Guillon, I. Stekl, Frédéric Nowacki, F. Piquemal, V. Palusova, F. Mamedov, Fedor Šimkovic, Igor Nemchenok, R. Salazar, A. Žukauskas, D. Duchesneau, J. Mott, L. Dawson, C. Vilela, P. Přidal, C. Hugon, Jouni Suhonen, R. Arnold, D. Lalanne, D. Waters, C.S. Sutton, Ch. Marquet, S. Söldner-Rembold, J. J. Evans, H. Gómez, A. Pin, Karol Lang, A. Huber, C. Patrick, A. A. Klimenko, D. Boursette, Ruben Saakyan, Guillaume Lutter, J. L. Reyss, R. B. Pahlka, I. Vanushin, L. Simard, G. Oliviéro, V. I. Tretyak, A. Chopra, Z. J. Liptak, Lukas Fajt, A. S. Barabash, H. Ohsumi, C. Girard-Carillo, Ph. Hubert, X. Garrido, T. Le Noblet, Dominique Durand, C. Macolino, R. L. Flack, M. Bongrand, D.V. Filosofov, S. Jullian, S. I. Konovalov, Masaharu Nomachi, S. Calvez, V. V. Timkin, V. G. Egorov, E. Rukhadze, X.R. Liu, V.I. Umatov, V. Brudanin, A. J. Caffrey, R. Hodák, Karel Smolek, B. Soulé, Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Aix Marseille Université (AMU), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire Souterrain de Modane (LSM - UMR 6417), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS), NEMO-3, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire d'Annecy de Physique des Particules (LAPP), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Institut Universitaire de France (IUF), Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.), Particle Physics and Astronomy Research Council (PPARC), Science and Technology Facilities Council (STFC), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Arnold, R, Augier, C, Barabash, A, Basharina-Freshville, A, Blondel, S, Blot, S, Bongrand, M, Boursette, D, Breier, R, Brudanin, V, Busto, J, Caffrey, A, Calvez, S, Cascella, M, Cerna, C, Cesar, J, Chapon, A, Chauveau, E, Chopra, A, Dawson, L, Duchesneau, D, Durand, D, Egorov, V, Eurin, G, Evans, J, Fajt, L, Filosofov, D, Flack, R, Garrido, X, Girard-Carillo, C, Gomez, H, Guillon, B, Guzowski, P, Hodak, R, Huber, A, Hubert, P, Hugon, C, Jullian, S, Klimenko, A, Kochetov, O, Konovalov, S, Kovalenko, V, Lalanne, D, Lang, K, Lemiere, Y, Le Noblet, T, Liptak, Z, Liu, X, Loaiza, P, Lutter, G, Macko, M, Macolino, C, Mamedov, F, Marquet, C, Mauger, F, Minotti, A, Morgan, B, Mott, J, Nemchenok, I, Nomachi, M, Nova, F, Nowacki, F, Ohsumi, H, Oliviero, G, Pahlka, R, Palusova, V, Patrick, C, Perrot, F, Pin, A, Piquemal, F, Povinec, P, Pridal, P, Ramachers, Y, Remoto, A, Reyss, J, Richards, B, Riddle, C, Rukhadze, E, Saakyan, R, Salazar, R, Sarazin, X, Sedgbeer, J, Shitov, Y, Simard, L, Simkovic, F, Smetana, A, Smolek, K, Smolnikov, A, Soldner-Rembold, S, Soule, B, Stekl, I, Suhonen, J, Sutton, C, Szklarz, G, Tedjditi, H, Thomas, J, Timkin, V, Torre, S, Tretyak, V, Umatov, V, Vanushin, I, Vilela, C, Vorobel, V, Waters, D, Xie, F, and Zukauskas, A

Subjects
Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Analytical chemistry, Se, Double beta decay, Excited state, Neutrino, FOS: Physical sciences, gamma ray: particle identification, 01 natural sciences, NO, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), PE2_2, Neutrino Ettore Majorana Observatory, 0201 Astronomical and Space Sciences, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 82Se, Double beta decay, Neutrino, 82Se, excited state, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, physics.ins-det, 0206 Quantum Physics, Physics, hep-ex, 010308 nuclear & particles physics, double-beta decay, Instrumentation and Detectors (physics.ins-det), State (functional analysis), krypton: nuclide, Nuclear & Particles Physics, 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics, selenium: nuclide, nucleus: excited state, experimental results
Abstract

The double-beta decay of 82Se to the 0 1 + excited state of 82Kr has been studied with the NEMO-3 detector using 0.93 kg of enriched 82Se measured for 4.75 y, corresponding to an exposure of 4.42 kg⋅y. A dedicated analysis to reconstruct the γ-rays has been performed to search for events in the 2e2γ channel. No evidence of a 2 ν β β decay to the 0 1 + state has been observed and a limit of T 1 / 2 2 ν ( Se 82 , 0 g s + → 0 1 + ) > 1.3 × 10 21 y at 90% CL has been set. Concerning the 0 ν β β decay to the 0 1 + state, a limit for this decay has been obtained with T 1 / 2 0 ν ( Se 82 , 0 g s + → 0 1 + ) > 2.3 × 10 22 y at 90% CL, independently from the 2 ν β β decay process. These results are obtained for the first time with a tracko-calo detector, reconstructing every particle in the final state.

Published
2020
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3. Detailed studies of $^{100}$Mo two-neutrino double beta decay in NEMO-3

Author

S. Blot, I. Vanushin, Lukas Fajt, M. Bongrand, Frédéric Nowacki, Karel Smolek, R. Saakyan, C. Vilela, B. Soulé, C. Augier, Masaharu Nomachi, Vl. I. Tretyak, S. Jullian, A. Smetana, V.E. Kovalenko, H. Gómez, Y. A. Ramachers, Jose Busto, F. Mauger, J. J. Evans, P. Guzowski, Y. Lemière, A. S. Barabash, S. Calvez, C. Patrick, A. Huber, D.V. Filosofov, M. Macko, Jouni Suhonen, A. Chapon, X. Sarazin, F. Xie, A. Chopra, Z. J. Liptak, A. J. Caffrey, R. Hodák, A. Žukauskas, V.I. Umatov, J.P. Cesar, Ph. Hubert, S. Torre, C. Girard-Carillo, X. Garrido, V. G. Egorov, O.I. Kochetov, S. Söldner-Rembold, F. Mamedov, E. Rukhadze, Yu. Shitov, V. Brudanin, D. Boursette, G. Eurin, D. Waters, J. C. Thomas, J. K. Sedgbeer, S. I. Konovalov, H. Ohsumi, F. Piquemal, T. Le Noblet, E. Chauveau, Guillaume Lutter, Dominique Durand, R. Dvornický, C. Cerna, Kevin Lang, Pavel P. Povinec, Ch. Marquet, C. Macolino, G. Oliviéro, C. Hugon, F. Nova, A. Minotti, A. Pin, R. L. Flack, L. Dawson, D. Lalanne, J. L. Reyss, B. Morgan, Michele Cascella, P. Loaiza, C. L. Riddle, R. B. Pahlka, L. Simard, D. Duchesneau, A. Remoto, R. Salazar, X.R. Liu, C.S. Sutton, R. Arnold, V. I. Tretyak, A.A. Smolnikov, G. Szklarz, B. Guillon, Fedor Šimkovic, P. Přidal, Igor Nemchenok, J. Mott, V. V. Timkin, Vit Vorobel, A. Salamatin, A. Basharina-Freshville, F. Perrot, H. Tedjditi, S. Blondel, I. Stekl, Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Aix Marseille Université (AMU), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire Souterrain de Modane (LSM - UMR 6417), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS), NEMO-3, Arnold, R, Augier, C, Barabash, A, Basharina-Freshville, A, Blondel, S, Blot, S, Bongrand, M, Boursette, D, Brudanin, V, Busto, J, Caffrey, A, Calvez, S, Cascella, M, Cerna, C, Cesar, J, Chapon, A, Chauveau, E, Chopra, A, Dawson, L, Duchesneau, D, Durand, D, Dvornicky, R, Egorov, V, Eurin, G, Evans, J, Fajt, L, Filosofov, D, Flack, R, Garrido, X, Girard-Carillo, C, Gomez, H, Guillon, B, Guzowski, P, Hodak, R, Huber, A, Hubert, P, Hugon, C, Jullian, S, Kochetov, O, Konovalov, S, Kovalenko, V, Lalanne, D, Lang, K, Lemiere, Y, Noblet, T, Liptak, Z, Liu, X, Loaiza, P, Lutter, G, Macko, M, Macolino, C, Mamedov, F, Marquet, C, Mauger, F, Minotti, A, Morgan, B, Mott, J, Nemchenok, I, Nomachi, M, Nova, F, Nowacki, F, Ohsumi, H, Oliviero, G, Pahlka, R, Patrick, C, Perrot, F, Pin, A, Piquemal, F, Povinec, P, Pridal, P, Ramachers, Y, Remoto, A, Reyss, J, Riddle, C, Rukhadze, E, Saakyan, R, Salamatin, A, Salazar, R, Sarazin, X, Sedgbeer, J, Shitov, Y, Simard, L, Simkovic, F, Smetana, A, Smolek, K, Smolnikov, A, Soldner-Rembold, S, Soule, B, Stekl, I, Suhonen, J, Sutton, C, Szklarz, G, Tedjditi, H, Thomas, J, Timkin, V, Torre, S, Tretyak, V, Umatov, V, Vanushin, I, Vilela, C, Vorobel, V, Waters, D, Xie, F, Zukauskas, A, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire d'Annecy de Physique des Particules (LAPP), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), and Science and Technology Facilities Council (STFC)

Subjects
Particle physics, S029MT, Physics and Astronomy (miscellaneous), FOS: Physical sciences, Elementary particle, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], nucl-ex, invariance: Lorentz, 01 natural sciences, 7. Clean energy, neutrinoless double beta decay, decay modes, Physics, Particles & Fields, double-beta decay: (0neutrino), SEARCH, Double beta decay, 0103 physical sciences, ground state, Nuclear Experiment (nucl-ex), 010306 general physics, 0206 Quantum Physics, Engineering (miscellaneous), Nuclear Experiment, Majoron, S076H2N, Physics, Science & Technology, HALF-LIFE, 010308 nuclear & particles physics, MO-100, High Energy Physics::Phenomenology, Nuclear & Particles Physics, violation: Lorentz, nucleus: transition, STATES, statistics, Physical Sciences, 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics, spectral, electron: energy spectrum, High Energy Physics::Experiment, Neutrino, Ground state, Energy (signal processing), Radioactive decay, Lepton
Abstract

The full data set of the NEMO-3 experiment has been used to measure the half-life of the two-neutrino double beta decay of $^{100}$Mo to the ground state of $^{100}$Ru, $T_{1/2} = \left[ 6.81 \pm 0.01\,\left(\mbox{stat}\right) ^{+0.38}_{-0.40}\,\left(\mbox{syst}\right) \right] \times10^{18}$ y. The two-electron energy sum, single electron energy spectra and distribution of the angle between the electrons are presented with an unprecedented statistics of $5\times10^5$ events and a signal-to-background ratio of ~80. Clear evidence for the Single State Dominance model is found for this nuclear transition. Limits on Majoron emitting neutrinoless double beta decay modes with spectral indices of n=2,3,7, as well as constraints on Lorentz invariance violation and on the bosonic neutrino contribution to the two-neutrino double beta decay mode are obtained., 11 pages, 9 figures

Published
2019
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4. Development of methods for the preparation of radiopure 82Se sources for the SuperNEMO neutrinoless double-beta decay experiment

Author

J. J. Evans, F. Perrot, Masaharu Nomachi, Jihane Maalmi, Dominique Breton, D. Duchesneau, P. Guzowski, Y. Lemière, X.R. Liu, R. Breier, S. Jullian, Hector Gomez, S. I. Konovalov, V. Egorov, F.A. Tashimova, Y. A. Ramachers, G. Claverie, B. Richards, V. B. Brudanin, J.P. Cesar, S. Torre, F. Mamedov, R. Salazar, Karol Holý, D. Waters, X. Sarazin, V. V. Timkin, V.I. Umatov, O.I. Kochetov, A. A. Mirsagatova, C. Vilela, A. V. Rakhimov, C. Hugon, Juergen Thomas, G. Eurin, I. Stekl, J. S. Ricol, J. Mott, I. I. Sadikov, A. S. Barabash, Lukas Fajt, D.V. Filosofov, H. Ohsumi, E. Rukhadze, T. Le Noblet, Ch. Bourgeois, Fedor Šimkovic, Igor Nemchenok, A. Huber, N.I. Rukhadze, A. Minotti, N.A. Mirzayev, L. Simard, A. Smetana, Vit Vorobel, S. Snow, P Pridal, J. Busto, A. Chopra, Z. J. Liptak, C. Cerna, G. Warot, Karol Lang, D. V. Karaivanov, H. Burešova, V. Kovalenko, M. Bongrand, E. Chauveau, Pavel P. Povinec, A. Žukauskas, A. Rebii, F. Nova, J. K. Sedgbeer, B. Morgan, A. Remoto, A. Basharina-Freshville, M. Kauer, R. B. Pahlka, Ruben Saakyan, F. Mauger, Guillaume Lutter, Karel Smolek, X. Garrido, B. Soulé, S. Calvez, A. A. Klimenko, G. Oliviéro, V.I. Tretyak, R. L. Flack, Michele Cascella, Vl. I. Tretyak, R. Hodák, S. Söldner-Rembold, Yu. Shitov, P. Loaiza, Ch. Marquet, B. Guillon, A.A. Smolnikov, M. Zampaolo, S. Blot, M. Spavorova, I. Moreau, E. Birdsall, V. Palušová, Joleen Pater, A. Jeremie, F. Piquemal, M. Macko, F. Delalee, S. De Capua, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Aix Marseille Université (AMU), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut Universitaire de France (IUF), Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Rakhimov, A, Barabash, A, Basharina-Freshville, A, Blot, S, Bongrand, M, Bourgeois, C, Breton, D, Breier, R, Birdsall, E, Brudanin, V, Buresova, H, Busto, J, Calvez, S, Cascella, M, Cerna, C, Cesar, J, Chauveau, E, Chopra, A, Claverie, G, De Capua, S, Delalee, F, Duchesneau, D, Egorov, V, Eurin, G, Evans, J, Fajt, L, Filosofov, D, Flack, R, Garrido, X, Gomez, H, Guillon, B, Guzowski, P, Hodak, R, Holy, K, Huber, A, Hugon, C, Jeremie, A, Jullian, S, Karaivanov, D, Kauer, M, Klimenko, A, Kochetov, O, Konovalov, S, Kovalenko, V, Lang, K, Lemiere, Y, Le Noblet, T, Liptak, Z, Liu, X, Loaiza, P, Lutter, G, Maalmi, J, Macko, M, Mamedov, F, Marquet, C, Mauger, F, Minotti, A, Mirsagatova, A, Mirzayev, N, Moreau, I, Morgan, B, Mott, J, Nemchenok, I, Nomachi, M, Nova, F, Ohsumi, H, Oliviero, G, Pahlka, R, Pater, J, Palusova, V, Perrot, F, Piquemal, F, Povinec, P, Pridal, P, Ramachers, Y, Rebii, A, Remoto, A, Richards, B, Ricol, J, Rukhadze, E, Rukhadze, N, Saakyan, R, Sadikov, I, Salazar, R, Sarazin, X, Sedgbeer, J, Shitov, Y, Simkovic, F, Simard, L, Smetana, A, Smolek, K, Smolnikov, A, Snow, S, Soldner-Rembold, S, Soule, B, Spavorova, M, Stekl, I, Tashimova, F, Thomas, J, Timkin, V, Torre, S, Tretyak, V, Umatov, V, Vilela, C, Vorobel, V, Warot, G, Waters, D, Zampaolo, M, Zukauskas, A, and Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
SuperNEMO, Technology, purification, ion exchange chromatography, SuperNEMO, LSM Modane, mass spectrometry, neutron activation analysis, purification, Selenium-82, measurement methods, Ion chromatography, chemistry.chemical_element, Selenium-82, fabrication, Mass spectrometry, 01 natural sciences, neutron activation analysi, NO, Neutrino Ettore Majorana Observatory, LSM Modane, double-beta decay: (0neutrino), Decantation, 0103 physical sciences, 0302 Inorganic Chemistry, Chemistry, Inorganic & Nuclear, Physical and Theoretical Chemistry, Neutron activation analysis, 010306 general physics, Nuclear Science & Technology, background: radioactivity, mass spectrometry, [PHYS]Physics [physics], Detection limit, Science & Technology, 010308 nuclear & particles physics, Radiochemistry, IMPURITIES, ion exchange chromatography, Contamination, Chemistry, chemistry, SPECTROMETRY, 13. Climate action, sulfur, Physical Sciences, ion: exchange, Inorganic & Nuclear Chemistry, selenium: production, selenium: nuclide, oxygen, Selenium, neutron activation analysis
Abstract

International audience; AbstractA radiochemical method for producing 82Se sources with an ultra-low level of contamination of natural radionuclides (40K, decay products of 232Th and 238U) has been developed based on cation-exchange chromatographic purification with reverse removal of impurities. It includes chromatographic separation (purification), reduction, conditioning (which includes decantation, centrifugation, washing, grinding, and drying), and 82Se foil production. The conditioning stage, during which highly dispersed elemental selenium is obtained by the reduction of purified selenious acid (H2SeO3) with sulfur dioxide (SO2) represents the crucial step in the preparation of radiopure 82Se samples. The natural selenium (600 g) was first produced in this procedure in order to refine the method. The technique developed was then used to produce 2.5 kg of radiopure enriched selenium (82Se). The produced 82Se samples were wrapped in polyethylene (12 μm thick) and radionuclides present in the sample were analyzed with the BiPo-3 detector. The radiopurity of the plastic materials (chromatographic column material and polypropylene chemical vessels), which were used at all stages, was determined by instrumental neutron activation analysis. The radiopurity of the 82Se foils was checked by measurements with the BiPo-3 spectrometer, which confirmed the high purity of the final product. The measured contamination level for 208Tl was 8–54 μBq/kg, and for 214Bi the detection limit of 600 μBq/kg has been reached.

Published
2019
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5. Final results on $${}^\mathbf{82 }{\hbox {Se}}$$ double beta decay to the ground state of $${}^\mathbf{82 }{\hbox {Kr}}$$ from the NEMO-3 experiment

Author

Ph. Hubert, F. Nova, A. Basharina-Freshville, F. Piquemal, O.I. Kochetov, B. Morgan, A. S. Barabash, C. L. Riddle, G. Eurin, A. Remoto, D.V. Filosofov, H. Ohsumi, A. J. Caffrey, T. Le Noblet, Dominique Durand, S. I. Konovalov, R. Hodák, P. Přidal, R. Saakyan, F. Xie, N.I. Rukhadze, Michele Cascella, R. L. Flack, B. Guillon, S. Calvez, Karol Lang, X.R. Liu, P. Loaiza, Jouni Suhonen, Jose Busto, P. Guzowski, Y. Lemière, S. Jullian, C.S. Sutton, Ch. Marquet, C. Macolino, C. Hugon, Karel Smolek, A. A. Klimenko, A. Chopra, Z. J. Liptak, A.A. Smolnikov, Yu. Shitov, B. Soulé, C. Vilela, A. Chapon, J. L. Reyss, Lukas Fajt, X. Sarazin, V.E. Kovalenko, R. B. Pahlka, F. Perrot, F. Mauger, Fedor Šimkovic, Guillaume Lutter, J. J. Evans, D. Lalanne, Igor Nemchenok, F. Nowacki, C. Augier, J. Mott, Y. A. Ramachers, S. Blot, G. Szklarz, M. Bongrand, J. C. Thomas, A. Huber, J.P. Cesar, S. Torre, F. Mamedov, I. Vanushin, V. I. Tretyak, C. Cerna, D. Boursette, V. V. Timkin, D. Waters, L. Dawson, D. Duchesneau, V.I. Umatov, C. Patrick, X. Garrido, Vl. I. Tretyak, V. Brudanin, S. Söldner-Rembold, R. Salazar, R. Arnold, A. Smetana, A. Žukauskas, H. Gómez, E. Chauveau, Pavel P. Povinec, Masaharu Nomachi, L. Simard, V. G. Egorov, E. Rukhadze, Vit Vorobel, S. Blondel, and I. Stekl

Subjects
Physics, Particle physics, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, 01 natural sciences, Lepton number, MAJORANA, Double beta decay, 0103 physical sciences, Beta (velocity), Neutrino Ettore Majorana Observatory, Neutrino, 010306 general physics, Ground state, Engineering (miscellaneous), Majoron
Abstract

Using data from the NEMO-3 experiment, we have measured the two-neutrino double beta decay ( $2\nu \beta \beta $ ) half-life of$^{82}$ Se as $T_{\smash {1/2}}^{2\nu } \!=\! \left[ 9.39 \pm 0.17\left( \text{ stat }\right) \pm 0.58\left( \text{ syst }\right) \right] \times 10^{19}$ y under the single-state dominance hypothesis for this nuclear transition. The corresponding nuclear matrix element is $\left| M^{2\nu }\right| = 0.0498 \pm 0.0016$ . In addition, a search for neutrinoless double beta decay ( $0\nu \beta \beta $ ) using 0.93 kg of$^{82}$ Se observed for a total of 5.25 y has been conducted and no evidence for a signal has been found. The resulting half-life limit of $T_{1/2}^{0\nu } > 2.5 \times 10^{23} \,\text{ y } \,(90\%\,\text{ C.L. })$ for the light neutrino exchange mechanism leads to a constraint on the effective Majorana neutrino mass of $\langle m_{\nu } \rangle < \left( 1.2{-}3.0\right) \,\text{ eV }$ , where the range reflects $0\nu \beta \beta $ nuclear matrix element values from different calculations. Furthermore, constraints on lepton number violating parameters for other $0\nu \beta \beta $ mechanisms, such as right-handed currents, majoron emission and R-parity violating supersymmetry modes have been set.

Published
2018
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6. Search for Neutrinoless Quadruple- β Decay of Nd150 with the NEMO-3 Detector

Author

A. Smetana, A. Žukauskas, V. G. Egorov, R. Saakyan, X. Sarazin, E. Rukhadze, R. Salazar, S. Calvez, Vit Vorobel, F. Nova, D. Waters, O.I. Kochetov, J. J. Evans, D. Lalanne, S. Blot, Vl.I. Tretyak, A.J. Caffrey, B. Morgan, S. Söldner-Rembold, A. Huber, B. Guillon, E. Chauveau, J. Busto, J. C. Thomas, L. Dawson, Masaharu Nomachi, C. L. Riddle, A. Remoto, P. Loaiza, V. I. Tretyak, V. V. Timkin, C. Cerna, C. Augier, R. Arnold, C. Vilela, R. Hodák, A. Basharina-Freshville, H. Ohsumi, C.S. Sutton, T. Le Noblet, Dominique Durand, X.R. Liu, Guillaume Lutter, D. Duchesneau, Hector Gomez, Fedor Šimkovic, Karol Lang, A. S. Barabash, Y. A. Ramachers, Igor Nemchenok, Michele Cascella, Jouni Suhonen, J. Mott, D.V. Filosofov, F. Xie, Karel Smolek, Frédéric Nowacki, Pavel P. Povinec, D. Štefánik, Ch. Marquet, P. Přidal, I. Stekl, X. Garrido, B. Soulé, F. Perrot, J.P. Cesar, A.A. Smolnikov, S. Torre, Yu. Shitov, V.I. Umatov, F. Mamedov, F. Piquemal, V.E. Kovalenko, F. Mauger, D. Boursette, G. Szklarz, G. Eurin, M. Macko, C. Macolino, C. Hugon, R. L. Flack, J. L. Reyss, R. B. Pahlka, S. Blondel, C. Patrick, A. A. Klimenko, M. Bongrand, V.B. Brudanin, I. Vanushin, L. Fajt, P. Guzowski, Y. Lemière, A. Chapon, L. Simard, A. Chopra, Z. J. Liptak, Ph. Hubert, S. Jullian, and S. I. Konovalov

Subjects
Physics, Particle physics, Electron energy spectrum, 010308 nuclear & particles physics, Detector, General Physics and Astronomy, chemistry.chemical_element, Electron, 01 natural sciences, 7. Clean energy, Neodymium, Lepton number, Beta decay, Nuclear physics, chemistry, 0103 physical sciences, Underground laboratory, 010306 general physics
Abstract

We report the results of a first experimental search for lepton number violation by four units in the neutrinoless quadruple-β decay of Nd150 using a total exposure of 0.19 kg yr recorded with the NEMO-3 detector at the Modane Underground Laboratory. We find no evidence of this decay and set lower limits on the half-life in the range T1/2>(1.1–3.2)×1021 yr at the 90% C.L., depending on the model used for the kinematic distributions of the emitted electrons.

Published
2017
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7. Measurement of the double-beta decay half-life and search for the neutrinoless double-beta decay ofCa48with the NEMO-3 detector

Author

F. Nova, X.R. Liu, B. Morgan, C. L. Riddle, A. Remoto, Hector Gomez, Jouni Suhonen, S. Calvez, S. V. Zhukov, M. Bongrand, Masaharu Nomachi, A. Basharina-Freshville, F. Piquemal, O.I. Kochetov, J. Baker, Karol Lang, D. Waters, V. I. Tretyak, R. Salazar, Vl.I. Tretyak, Jose Busto, V. G. Egorov, S. Blondel, V. V. Timkin, Y. A. Ramachers, X. Sarazin, E. Rukhadze, B. Richards, P. Guzowski, Y. Lemière, V. I. Lebedev, Guillaume Lutter, A. M. Bakalyarov, J. L. Reyss, J.P. Cesar, S. Torre, F. Mamedov, V.E. Kovalenko, F. Mauger, Frédéric Nowacki, A. Chapon, Fedor Šimkovic, G. Szklarz, R. Arnold, Igor Nemchenok, A. Smetana, A. Chopra, Z. J. Liptak, C. Hugon, V. B. Brudanin, J. Mott, P. Loaiza, Michele Cascella, R. Saakyan, G. Eurin, F. Perrot, V. I. Umatov, R. B. Pahlka, I. Stekl, S. Söldner-Rembold, A. S. Barabash, S. Blot, D.V. Filosofov, L. Simard, Ch. Marquet, N.I. Rukhadze, A. Žukauskas, Ph. Hubert, Vit Vorobel, E. Chauveau, A.A. Smolnikov, R. L. Flack, J. J. Evans, A. A. Klimenko, S. Jullian, D. Lalanne, Yu. Shitov, A. Huber, J. C. Thomas, C. Cerna, Lukas Fajt, I. Vanushin, Pavel P. Povinec, C.S. Sutton, H. Ohsumi, T. Le Noblet, Dominique Durand, S. I. Konovalov, P. Přidal, A. J. Caffrey, R. Hodák, Karel Smolek, X. Garrido, B. Soulé, D. Duchesneau, C. Vilela, B. Guillon, and C. Augier

Subjects
Physics, Particle physics, 010308 nuclear & particles physics, Half-life, 01 natural sciences, Lower limit, Nuclear physics, MAJORANA, Double beta decay, 0103 physical sciences, Underground laboratory, Neutrino, 010306 general physics, Majoron
Abstract

The NEMO-3 experiment at the Modane Underground Laboratory has investigated the double-$\beta$ decay of $^{48}{\rm Ca}$. Using $5.25$ yr of data recorded with a $6.99\,{\rm g}$ sample of $^{48}{\rm Ca}$, approximately $150$ double-$\beta$ decay candidate events have been selected with a signal-to-background ratio greater than $3$. The half-life for the two-neutrino double-$\beta$ decay of $^{48}{\rm Ca}$ has been measured to be $T^{2\nu}_{1/2}\,=\,[6.4\, ^{+0.7}_{-0.6}{\rm (stat.)} \, ^{+1.2}_{-0.9}{\rm (syst.)}] \times 10^{19}\,{\rm yr}$. A search for neutrinoless double-$\beta$ decay of $^{48}{\rm Ca}$ yields a null result and a corresponding lower limit on the half-life is found to be $T^{0\nu}_{1/2} > 2.0 \times 10^{22}\,{\rm yr}$ at $90\%$ confidence level, translating into an upper limit on the effective Majorana neutrino mass of $ < 6.0 - 26$ ${\rm eV}$, with the range reflecting different nuclear matrix element calculations. Limits are also set on models involving Majoron emission and right-handed currents.

Published
2016
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8. Results of the search for neutrinoless double-βdecay inMo100with the NEMO-3 experiment

Author

B. Morgan, C. L. Riddle, A. Remoto, A. Basharina-Freshville, J. Baker, Fedor Šimkovic, Igor Nemchenok, F. Piquemal, S. Söldner-Rembold, S. Calvez, V. Egorov, D. Duchesneau, V. V. Timkin, A. S. Barabash, E. Rukhadze, V.I. Tretyak, A. Huber, A. A. Klimenko, D.V. Filosofov, Jouni Suhonen, L. Simard, A. Smetana, J. L. Reyss, F. Perrot, Ruben Saakyan, V. Vorobel, Stijn Blot, R. B. Pahlka, Frédéric Nowacki, Guillaume Lutter, J. J. Evans, D. Lalanne, Yu. Shitov, C. Augier, Ph. Hubert, Karel Smolek, B. Soulé, C. Cerna, Jose Busto, P. Guzowski, Y. Lemière, A. J. Caffrey, V. I. Umatov, A. Chapon, F. Nova, V.E. Kovalenko, Haley Louise Gomez, M. Bongrand, D. Waters, F. Mauger, R. Arnold, S. I. Konovalov, E. Chauveau, Pavel P. Povinec, O.I. Kochetov, C. Vilela, I. Vanushin, S. Jullian, Catherine Marquet, S. Blondel, G. Eurin, Lukas Fajt, J. Mott, Z. J. Liptak, V.B. Brudanin, C. Hugon, Y. A. Ramachers, B. Richards, J.P. Cesar, S. Torre, F. Mamedov, K. Lang, P. Loaiza, C. S. Sutton, G. Szklarz, X. Sarazin, Juergen Thomas, R. Hodák, Masaharu Nomachi, R. Flack, B. Guillon, P. Přidal, A.A. Smolnikov, I. Stekl, A. Žukauskas, Vl.I. Tretyak, H. Ohsumi, T. Le Noblet, Dominique Durand, and Xavier Garrido

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Signal region, 01 natural sciences, Beta decay, Lower limit, Nuclear physics, MAJORANA, Double beta decay, 0103 physical sciences, Underground laboratory, Beta (velocity), Neutrino, 010306 general physics
Abstract

The NEMO-3 detector, which had been operating in the Modane Underground Laboratory from 2003 to 2010, was designed to search for neutrinoless double $\beta$ ($0\nu\beta\beta$) decay. We report final results of a search for $0\nu\beta\beta$ decays with $6.914$ kg of $^{100}$Mo using the entire NEMO-3 data set with a detector live time of $4.96$ yr, which corresponds to an exposure of 34.3 kg$\cdot$yr. We perform a detailed study of the expected background in the $0\nu\beta\beta$ signal region and find no evidence of $0\nu\beta\beta$ decays in the data. The level of observed background in the $0\nu\beta\beta$ signal region $[2.8-3.2]$ MeV is $0.44 \pm 0.13$ counts/yr/kg, and no events are observed in the interval $[3.2-10]$ MeV. We therefore derive a lower limit on the half-life of $0\nu\beta\beta$ decays in $^{100}$Mo of $T_{1/2}(0\nu\beta\beta)> 1.1 \times 10^{24}$ yr at the $90\%$ Confidence Level, under the hypothesis of light Majorana neutrino exchange. Depending on the model used for calculating nuclear matrix elements, the limit for the effective Majorana neutrino mass lies in the range $\langle m_{\nu} \rangle < 0.33$--$0.62$ eV. We also report constraints on other lepton-number violating mechanisms for $0\nu\beta\beta$ decays.

Published
2015
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9. New search for double electron capture in Cd-106 decay with the TGV-2 spectrometer

Author

Lukas Fajt, V. B. Brudanin, V. G. Egorov, E. Rukhadze, A.V. Salamatin, J. M. Jose, R. Hodák, S. V. Rosov, Yu. Shitov, A. A. Klimenko, N. I. Rukhadze, A. Kovalík, Ch. Briançon, V. V. Timkin, M. Špavorova, E. A. Yakushev, F. Šimkovic, I. Stekl, CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, [PHYS]Physics [physics], Nuclear and High Energy Physics, Isotope, Spectrometer, 010308 nuclear & particles physics, Stable isotope ratio, Electron capture, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Atomic and Molecular Physics, and Optics, Nuclear physics, Double beta decay, Isotopes of cadmium, 0103 physical sciences, Gamma spectroscopy, DOUBLE-BETA DECAY, 010306 general physics, Radioactive decay
Abstract

International audience; A new experiment devoted to searches for double electron capture in Cd-106 decay is being performed at the Modane underground laboratory (4800 mwe) with the 32-detector TGV-2 spectrometer. The limit T (1/2)(2 nu EC/EC) > 2.0x10(20) yr at a 90%confidence level (C.L.) was obtained from a preliminary analysis of data obtained over 2250 h of measurements with about 23.2 g sample enriched in the isotope Cd-106 to 99.57%. The limits T (1/2)(KL, 2741 keV) > 0.9 x 10(20) yr and T (1/2)(KK, 2718 keV) a parts per thousand << 1.4 x 10(20) yr at a 90% C.L. on the neutrinoless decay of Cd-106 were obtained from measurements performed with the Obelix low-background spectrometer from high-purity germanium (HPGe spectrometer) for a sample of mass about 23.2 g enriched in the isotope Cd-106.

Published
2015
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10. Double electron capture of 106Cd in the TGV-2 experiment

Author

A.V. Salamatin, N. I. Rukhadze, V. B. Brudanin, P. Kouba, Fedor Šimkovic, E. A. Yakushev, V. G. Egorov, V. V. Timkin, E. Rukhadze, F. Rychnovský, Lukas Fajt, Ch. Briançon, I. Stekl, R. Hodák, Yu. Shitov, A. Kovalík, A. A. Klimenko, F. Piquemal, S. V. Rozov, CSNSM SNO, Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), and Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS]Physics [physics], Physics, Electron spectrometer, Spectrometer, 010308 nuclear & particles physics, Electron capture, double beta decay, Resonance, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 7. Clean energy, 01 natural sciences, Beta decay, Nuclear physics, neutrino, Double beta decay, Isotopes of cadmium, 0103 physical sciences, 010306 general physics, Radioactive decay
Abstract

International audience; A new experimental run of searching for EC/EC decay of Cd-106 was performed at the Modane underground laboratory (4800 m w.e.) using the TGV-2 spectrometer and similar to 23.2 g Cd-106 with enrichment of 99.57%. The limit on 2 nu EC/EC decay of Cd-106 -T-1/2(2 nu EC/EC) > 3.1x10(20) y, at 90% C. L was obtained from the preliminary calculation of experimental data accumulated for 7018 h of measurement. The limits on the resonance neutrino-less double electron capture decay of Cd-106 were obtained from the measurement of similar to 23.2 g of Cd-106 with the low-background HPGe spectrometer OBELIX lasted 395 h -T-1/2(KL, 2741 keV) > 0.9x10(20) y and T-1/2(KK, 2718 keV) > 1.4x10(20) y at 90% C.L.

Published
2015
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11. Search for neutrinoless double-beta decay ofMo100with the NEMO-3 detector

Author

C. Hugon, I. Vanushin, Pavel P. Povinec, E. Rukhadze, V. Egorov, A.J. Caffrey, F. Nova, Karol Lang, X. Sarazin, B. Morgan, A. Smetana, D. Waters, Guillaume Lutter, Catherine Marquet, C. L. Riddle, A. Remoto, P. Loaiza, C. Augier, F. Piquemal, V.I. Tretyak, D. Lalanne, D. Durand, Juergen Thomas, A. Basharina-Freshville, J. Busto, R. Saakyan, J. Mott, A. S. Barabash, Y. Lemière, V. I. Umatov, J. J. Evans, A.A. Smolnikov, A. A. Klimenko, L. Simard, Fedor Šimkovic, Hector Gomez, V.B. Brudanin, R. Hodák, J. L. Reyss, Masaharu Nomachi, Igor Nemchenok, C. Cerna, S. Blot, Z. J. Liptak, A. Chapon, R. B. Pahlka, Ph. Hubert, P. Guzowski, D. Duchesneau, S. Jullian, C.S. Sutton, F. Nowacki, Karel Smolek, X. Garrido, B. Soulé, R. Arnold, Jouni Suhonen, R. L. Flack, G. Eurin, V. V. Timkin, A. Žukauskas, F. Mauger, J. Baker, V. Kovalenko, B. Guillon, S. I. Konovalov, Yu. Shitov, O.I. Kochetov, C. Vilela, F. Perrot, B. Richards, S. Torre, F. Mamedov, G. Szklarz, Y. A. Ramachers, S. Söldner-Rembold, M. Bongrand, S. Blondel, Vit Vorobel, E. Chauveau, I. Stekl, Vl.I. Tretyak, and H. Ohsumi

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Electron, 01 natural sciences, Beta decay, Lepton number, Nuclear physics, MAJORANA, Double beta decay, 0103 physical sciences, Beta (velocity), Neutrino, 010306 general physics, Energy (signal processing)
Abstract

We report the results of a search for the neutrinoless double-$\beta$ decay (0$\nu\beta\beta$) of $^{100}$Mo, using the NEMO-3 detector to reconstruct the full topology of the final state events. With an exposure of 34.7 kg.y, no evidence for the 0$\nu\beta\beta$ signal has been found, yielding a limit for the light Majorana neutrino mass mechanism of $T_{1/2}(0\nu\beta\beta)>1.1 \times 10^{24}$ years (90% C.L.) once both statistical and systematic uncertainties are taken into account. Depending on the Nuclear Matrix Elements this corresponds to an upper limit on the Majorana effective neutrino mass of $ < 0.3-0.8$ eV (90% C.L.). Constraints on other lepton number violating mechanisms of 0$\nu\beta\beta$ decays are also given. Searching for high-energy double electron events in all suitable sources of the detector, no event in the energy region [3.2-10] MeV is observed for an exposure of 47 kg.y.

Published
2014
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