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Measurement of the double-beta decay half-life on Nd-150 and search for neutrinoless decay modes with the NEMO-3 detector

AuthorsArgyriades, J.; Arnold, R.; Augier, C.; Baker, J.; Barabash, A. S.; Basharina-Freshville, A.; Bongrand, M.; Broudin, G.; Caffrey, A. J.; Chauveau, E.; Daraktchieva, Z.; Durand, D.; Egorov, V. G.; Fatemi-Ghomi, N.; Flack, Robert L.; Hubert, P.; Jerie, J.; Jullian, S.; Kauer, M.; King, S.; Klimenko, A.; Kochetov, O. I.; Konovalov, S. I.; Kovalenko, V. E.; Lalanne, D.; Lamhamdi, T.; Lang, K.; Lemiere, Y.; Longuemare, C.; Lutter, G.; Marquet, C.; Martín-Albo, Justo ; Mauger, F.; Nachab, A.; Nasteva, I.; Nemchenok, I. B.; Nova, F.; Novella, Pau ; Oshumi, H.; Pahlka, R. B.; Perrot, F.; Piquemal, F.; Reyss, J. L.; Ricol, J. S.; Saakyan, R.; Sarazin, X.; Simard, L.; Simkovic, F.; Shitov, Y. A.; Smolnikov, A.; Snow, S.; Soldner-Rembold, S.; Stekl, I.; Suhonen, J.; Sutton, C. S.; Szklarz, G.; Thomas, J.; Timkin, V. V.; Tretyak, V. I.; Umatov, V.; Vala, L.; Vanyushin, I. A.; Vasiliev, V. A.; Vorobel, V.; Vylov, T.; NEMO Collaboration
Issue Date22-Apr-2009
PublisherAmerican Physical Society
CitationPhysical Review - Section C - Nuclear Physics 80 (3): 032501 (2009)
AbstractThe half-life for double-beta decay of Nd-150 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 Nd-150, we measured the half-life for 2 nu beta beta decay to be T-1/2(2 nu) = (9.11(-0.22)(+0.25)(stat.) +/- 0.63(syst.)) x 10(18) yr. The observed limit on the half-life for neutrinoless double-beta decay is found to be T-1/2(0 nu) > 1.8 x 10(22) yr at 90% confidence level. This translates into a limit on the effective Majorana neutrino mass of < m(nu)> < 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.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevC.80.032501
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