680 articles – 6884 Notices  [english version]
HAL : in2p3-00427207, version 1

Fiche détaillée  Récupérer au format
Physical Review C 80 (2009) 032501
Measurement of the double-β decay half-life of 150Nd and search for neutrinoless decay modes with the NEMO-3 detector
J. Argyriades1, R. Arnold2, C. Augier1, 3, J. Baker, A.S. Barabash, A. Basharina-Freshville, M. Bongrand1, G. Broudin4, V. Brudanin, A.J. Caffrey, E. Chauveau4, Z. Daraktchieva, D. Durand5, V. A. Egorov, N. Fatemi-Ghomi, R. Flack, Ph. Hubert4, J. Jerie, S. Jullian1, M. Kauer, S. King, A. Klimenko, O. Kochetov, S.I. Konovalov, V. V. Kovalenko, D. Lalanne1, T. Lamhamdi, K. Lang, Y. Lemière5, C. Longuemare5, G. Lutter4, Ch. Marquet4, J. Martin-albo, F. Mauger5, A. Nachab4, I. Nasteva, I. Nemchenok, F. Nova, P. Novella, H. Ohsumi, R.B. Pahlka, F. Perrot4, F. Piquemal4, J.L. Reyss6, J.S. Ricol4, R. Saakyan, X. Sarazin1, L. Simard1, F. Simkovic, Yu. Shitov, A. Smolnikov, S. Snow, S. Soldner-Rembold, I. Stekl, J. Suhonen, C.S. Sutton, G. Szklarz1, J. Thomas, V. Timkin, V. Tretyak, V. Umatov, L. Vala, I. Vanyushin, V. Vasiliev, V. Vorobel, Ts. Vylov
NEMO Collaboration(s)
(09/2009)

The half-life for double-β decay of 150Nd has been measured by the NEMO-3 experiment at the Modane Underground Laboratory. Using 924.7 days of data recorded with 36.55 g of 150Nd, we measured the half-life for 2νββ decay to be T 2ν 1/2 = (9.11+0.25 −0.22(stat.) ± 0.63(syst.)) × 1018 yr. The observed limit on the half-life for neutrinoless double-β decay is found to be T 0ν 1/2 > 1.8 × 1022 yr at 90% confidence level. This translates into a limit on the effective Majorana neutrino mass of (mν ) < 4.0-6.3 eV if the nuclear deformation is taken into account. We also set limits on models involving Majoron emission, right-handed currents, and transitions to excited states.
1 :  LAL - Laboratoire de l'Accélérateur Linéaire
2 :  IPHC - Institut Pluridisciplinaire Hubert Curien
3 :  IPNL - Institut de Physique Nucléaire de Lyon
4 :  CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan
5 :  LPCC - Laboratoire de Physique Corpusculaire de Caen
6 :  LSCE - UMR 8212 - Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette]
Intéractions fondamentales
Physique/Physique Nucléaire Expérimentale