A New Limit on the Neutrinoless DBD of 130Te
Abstract
We report the present results of CUORICINO a cryogenic experiment on neutrinoless double beta decay (DBD) of 130Te consisting of an array of 62 crystals of TeO2 with a total active mass of 40.7 kg. The array is framed inside of a dilution refrigerator, heavily shielded against environmental radioactivity and high-energy neutrons, and operated at a temperature of ~8 mK in the Gran Sasso Underground Laboratory. Temperature pulses induced by particle interacting in the crystals are recorded and measured by means of Neutron Transmutation Doped thermistors. The gain of each bolometer is stabilized with voltage pulses developed by a high stability pulse generator across heater resistors put in thermal contact with the absorber. The calibration is performed by means of two thoriated wires routinely inserted in the set-up. No evidence for a peak indicating neutrinoless DBD of 130Te is detected and a 90% C.L. lower limit of 1.8E24 years is set for the lifetime of this process. Taking largely into account the uncertainties in the theoretical values of nuclear matrix elements, this implies an upper boud on the effective mass of the electron neutrino ranging from 0.2 to 1.1 eV. This sensitivity is similar to those of the 76Ge experiments.
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Cite
@article{arxiv.hep-ex/0501034,
title = {A New Limit on the Neutrinoless DBD of 130Te},
author = {C. Arnaboldi and D. R. Artusa and F. T. Avignone and M. Balata and I. Bandac and M. Barucci and J. W. Beeman and C. Brofferio and C. Bucci and S. Capelli and L. Carbone and S. Cebrian and O. Cremonesi and R. J. Creswick and A. de Waard and H. A. Farach and E. Fiorini and G. Frossati and E. Guardincerri and A. Giuliani and P. Gorla and E. E. Haller and J. McDonald and E. B. Norman and A. Nucciotti and E. Olivieri and M. Pallavicini and E. Palmieri and E. Pasca and M. Pavan and M. Pedretti and G. Pessina and S. Pirro and E. Previtali and L. Risegari and C. Rosenfeld and S. Sangiorgio and M. Sisti and A. R. Smith and L. Torres and G. Ventura},
journal= {arXiv preprint arXiv:hep-ex/0501034},
year = {2008}
}
Comments
4 pages, 2 figures