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Initial performance of the CUORE-0 experiment

Abstract : CUORE-0 is a cryogenic detector that uses an array of tellurium dioxide bolometers to search for neutrinoless double-beta decay of $\mathrm {^{130}Te}$ . We present the first data analysis with $7.1 \,\mathrm {kg\cdot y}$ of total $\mathrm {TeO_2}$ exposure focusing on background measurements and energy resolution. The background rates in the neutrinoless double-beta decay region of interest (2.47 to $2.57 \,\mathrm {MeV}$ ) and in the $\alpha $ background-dominated region (2.70 to $3.90\,\mathrm {MeV}$ ) have been measured to be ${0.071\pm 0.011}$ and ${0.019\pm 0.002}\,\mathrm {counts/(keV\cdot kg\cdot y)}$ , 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 $5.7\,\mathrm {keV}$ . 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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Contributor : Emilie Bonnardel <>
Submitted on : Tuesday, September 23, 2014 - 4:01:34 PM
Last modification on : Wednesday, September 16, 2020 - 5:43:07 PM

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C.P. Aguirre, D.R. Artusa, F.T. Avignone, O. Azzolini, M. Balata, et al.. Initial performance of the CUORE-0 experiment. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2014, 74, pp.2956. ⟨10.1140/epjc/s10052-014-2956-6⟩. ⟨in2p3-01066949⟩



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