Bolometers are ideal devices in the search for neutrinoless Double Beta Decay (0ν DBD). Enlarging the mass of individual detectors would simplify the construction of a large experiment, but would also decrease the background per unit mass induced by α-emitters located close to the surfaces and background arising from external and internal γ's. We present the very promising results obtained with a 2.13 kg TeO2 crystal. This bolometer, cooled down to a temperature of 10.5 mK in a dilution refrigerator located deep underground in the Gran Sasso National Laboratories, represents the largest thermal detector ever operated. The detector exhibited an energy resolution spanning a range from 3.9 keV (at 145 keV) to 7.8 keV (at the 2615 γ-line of 208Tl) FWHM. We discuss the decrease in the background per unit mass that can be achieved increasing the mass of a bolometer. © 2012 IOP Publishing Ltd and SISSA.

Cardani, L., Gironi, L., Beeman, J., Dafinei, I., Ge, Z., Pessina, G., et al. (2012). Performance of a large TeO2 crystal as a cryogenic bolometer in searching for neutrinoless double beta decay. JOURNAL OF INSTRUMENTATION, 7 [10.1088/1748-0221/7/01/P01020].

Performance of a large TeO2 crystal as a cryogenic bolometer in searching for neutrinoless double beta decay

GIRONI, LUCA;Pessina, G;
2012

Abstract

Bolometers are ideal devices in the search for neutrinoless Double Beta Decay (0ν DBD). Enlarging the mass of individual detectors would simplify the construction of a large experiment, but would also decrease the background per unit mass induced by α-emitters located close to the surfaces and background arising from external and internal γ's. We present the very promising results obtained with a 2.13 kg TeO2 crystal. This bolometer, cooled down to a temperature of 10.5 mK in a dilution refrigerator located deep underground in the Gran Sasso National Laboratories, represents the largest thermal detector ever operated. The detector exhibited an energy resolution spanning a range from 3.9 keV (at 145 keV) to 7.8 keV (at the 2615 γ-line of 208Tl) FWHM. We discuss the decrease in the background per unit mass that can be achieved increasing the mass of a bolometer. © 2012 IOP Publishing Ltd and SISSA.
Articolo in rivista - Articolo scientifico
double beta decay; bolometer; TeO2
English
2012
7
none
Cardani, L., Gironi, L., Beeman, J., Dafinei, I., Ge, Z., Pessina, G., et al. (2012). Performance of a large TeO2 crystal as a cryogenic bolometer in searching for neutrinoless double beta decay. JOURNAL OF INSTRUMENTATION, 7 [10.1088/1748-0221/7/01/P01020].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/37583
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