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Abstract

CUORE-0 is a cryogenic detector that uses an array of tellurium dioxide bolometers to search for neutrinoless double-beta decay of 130Te" style="position: relative;" tabindex="0" id="MathJax-Element-1-Frame">130Te. We present the first data analysis with 7.1kg⋅y" style="position: relative;" tabindex="0" id="MathJax-Element-2-Frame">7.1kg⋅y of total TeO2" style="position: relative;" tabindex="0" id="MathJax-Element-3-Frame">TeO2 exposure focusing on background measurements and energy resolution. The background rates in the neutrinoless double-beta decay region of interest (2.47 to 2.57MeV" style="position: relative;" tabindex="0" id="MathJax-Element-4-Frame">2.57MeV) and in the α" style="position: relative;" tabindex="0" id="MathJax-Element-5-Frame">α background-dominated region (2.70 to 3.90MeV" style="position: relative;" tabindex="0" id="MathJax-Element-6-Frame">3.90MeV) have been measured to be 0.071±0.011" style="position: relative;" tabindex="0" id="MathJax-Element-7-Frame">0.071±0.011 and 0.019±0.002counts/(keV⋅kg⋅y)" style="position: relative;" tabindex="0" id="MathJax-Element-8-Frame">0.019±0.002counts/(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 5.7keV" style="position: relative;" tabindex="0" id="MathJax-Element-9-Frame">5.7keV. 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.

Disciplines

Physics

Number of Pages

7

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Physics Commons

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URL: https://digitalcommons.calpoly.edu/phy_fac/508