Search for ß+/EC double beta decay of 120Te

Year: 2011

Authors: Andreotti E., Arnaboldi C., Avignone III F.T., Balata M., Bandac I., Barucci M., Beeman J.W., Bellini F., Brofferio C., Bryant A., Bucci C., Canonica L., Capelli S., Carbone L., Carrettoni M., Clemenza M., Cremonesi O., Creswick R.J., Di Domizio S., Dolinski M.J., Ejzak L., Faccini R., Farach H.A., Ferri E., Fiorini E., Foggetta L., Giachero A., Gironi L., Giuliani A., Gorla P., Guardincerri E., Gutierrez T.D., Haller E.E., Kazkaz K., Kraft S., Kogler L., Maiano C., Maruyama R.H., Martinez C., Martinez M., Newman S., Nisi S., Nones C., Norman E.B., Nucciotti A., Orio F., Pallavicini M., Palmieri V., Pattavina L., Pavan M., Pedretti M., Pessina G., Pirro S., Previtali E., Risegari L., Rosenfeld C., Rusconi C., Salvioni C., Sangiorgio S., Schaeffer D., Scielzo N.D., Sisti M., Smith A.R., Tomei C., Ventura G., Vignati M.

Autors Affiliation: Dip. di Fisica e Matematica, Dell\’Univ. dell\’Insubria, Como I-22100, Italy; Dip. di Fisica dell\’Universit, di Milano-Bicocca I-20126, Italy; Sez. INFN di Mi-Bicocca, Milano I-20126, Italy; Deptartment of Physics and Astronomy, University of South Carolina, Columbia, SC 29208, United States; Laboratori Nazionali Del Gran Sasso, I-67010 Assergi (L\’Aquila), Italy; Dip. di Fisica, Dell\’Universit di Firenze, Sez. INFN di Firenze, Firenze I-50125, Italy; Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States; Dip. di Fisica dell\’Universit, Roma la Sapienza, Sez. INFN di Roma, Roma I-00185, Italy; Department of Physics, University of California, Berkeley, CA 94720, United States; Dip. di Fisica dell\’Universit, di Genova, Italy; Sez. INFN di Genova, Genova I-16146, Italy; Lawrence Livermore National Laboratory, Livermore, CA 94550, United States; University of Wisconsin, Madison, WI, United States; California Polytechnic State University, San Luis Obispo, CA 93407, United States; Department of Materials Science and Engineering, University of California, Berkeley, CA 94720, United States; Department of Nuclear Engineering, University of California, Berkeley, CA 94720, United States; Laboratori Nazionali di Legnaro, I-35020 Legnaro (Padova), Italy

Abstract: We present a search for ß+/EC double beta decay of 120Te performed with the CUORICINO experiment, an array of TeO2 cryogenic bolometers. After collecting 0.0573 kg · y of 120Te, we see no evidence of a signal and therefore set the following limits on the half-life: T1/20?>1.9·1021 y at 90% C.L. for the 0? mode and T1/22?>7.6·1019 y at 90% C.L. for the 2? mode. These results improve the existing limits by almost three orders of magnitude (four in the case of 0? mode).

Journal/Review: ASTROPARTICLE PHYSICS

Volume: 34 (8)      Pages from: 643  to: 648

KeyWords: Double beta decay; Electron capture; Neutrino mass; Neutrino properties; Three orders of magnitude, Bolometers; Infrared detectors; Tellurium compounds, Elementary particles
DOI: 10.1016/j.astropartphys.2010.12.011

Citations: 18
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