TeO(2) crystals are used as bolometers in experiments searching for Double Beta Decay without emission of neutrinos. One of the most important issues in this extremely delicate kind of experiments is the characterization of the background. The knowledge of the response to a particles in the energy range where the signal is expected is therefore a must. In this paper we report the results on the response function of a TeO(2) bolometer to alpha's emitted by (147)Sm dissolved in the crystal at the growth phase. A Quenching Factor of (1.0076 +/- 0.0005) is found, independent of the temperature in the investigated range. The energy resolution on a peaks shows a standard calorimeter energy dependence: sigma[keV] = (0.56 +/- 0.02) circle plus (0.010 +/- 0.002) root E[keV]. Signal pulse shape shows no difference between alpha and beta/gamma particles.

Response of a TeO(2) bolometer to alpha particles

FERRONI, Fernando
2010

Abstract

TeO(2) crystals are used as bolometers in experiments searching for Double Beta Decay without emission of neutrinos. One of the most important issues in this extremely delicate kind of experiments is the characterization of the background. The knowledge of the response to a particles in the energy range where the signal is expected is therefore a must. In this paper we report the results on the response function of a TeO(2) bolometer to alpha's emitted by (147)Sm dissolved in the crystal at the growth phase. A Quenching Factor of (1.0076 +/- 0.0005) is found, independent of the temperature in the investigated range. The energy resolution on a peaks shows a standard calorimeter energy dependence: sigma[keV] = (0.56 +/- 0.02) circle plus (0.010 +/- 0.002) root E[keV]. Signal pulse shape shows no difference between alpha and beta/gamma particles.
bolometers for dark matter research; cryogenic detectors
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12571/2390
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