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Initial Performance of the CUORE-0 Experiment

The European Physical Journal C(2014)

Department of Physics and Astronomy

Cited 87|Views1
Abstract
CUORE-0 is a cryogenic detector that uses an array of tellurium dioxide bolometers to search for neutrinoless double-beta decay of ^130Te . We present the first data analysis with 7.1 kg· y of total TeO_2 exposure focusing on background measurements and energy resolution. The background rates in the neutrinoless double-beta decay region of interest (2.47 to 2.57 MeV ) and in the α background-dominated region (2.70 to 3.90 MeV ) have been measured to be 0.071± 0.011 and 0.019± 0.002 counts/(keV· kg· y) , respectively. The latter result represents a factor of 6 improvement from a predecessor experiment, Cuoricino. The results verify our understanding of the background sources in CUORE-0, which is the basis of extrapolations to the full CUORE detector. The obtained energy resolution (full width at half maximum) in the region of interest is 5.7 keV . Based on the measured background rate and energy resolution in the region of interest, CUORE-0 half-life sensitivity is expected to surpass the observed lower bound of Cuoricino with one year of live time.
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Key words
Energy Resolution,Background Rate,Tellurium Dioxide,Flexible Print Circuit Board,Neutron Transmutation Dope
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