Author/Authors :
Pirro، نويسنده , , S and Alessandrello، نويسنده , , A and Brofferio، نويسنده , , C and Bucci، نويسنده , , C and Cremonesi، نويسنده , , O and Fiorini، نويسنده , , E and Giuliani، نويسنده , , A and Nucciotti، نويسنده , , A and Pavan، نويسنده , , M and Pessina، نويسنده , , G and Pobes، نويسنده , , C and Previtali، نويسنده , , E and Vanzini، نويسنده , , M and Zanotti، نويسنده , , L، نويسنده ,
Abstract :
Present results on neutrinoless double beta decay of 130Te obtained with an array of 20 cryogenic detectors are presented. The setup consists of 20 crystals of tellurium oxide of 340 g each, corresponding to the largest presently operating cryogenic mass. Combining the results of the few runs obtained with the same array, corresponding to 1.5 kg yr, a limit on neutrinoless double beta decay half-life of 9.5×1022 yr (90% CL) has been obtained. On the basis of the results obtained with the MI-BETA experiment, we propose a construction of a 42 kg array of 56 TeO2 bolometers (CUORICINO project) to extend the sensitivity of the present experiment, and as a first test for CUORE. Thanks to an innovative technique of vibration reduction and despite the high mass (750 g instead of the 340 g of the presently running detectors) we reached an energy resolution of 3.9 keV FWHM at 2615 keV decreasing to 1.4 keV at low energies.
