CdWO4 scintillating bolometer for Double Beta Decay: Light and heat anticorrelation, light yield and quenching factors

被引：79

作者：

Arnaboldi, C. ^{[1
]}

Beeman, J. W. ^{[3
]}

Cremonesi, O. ^{[1
]}

Gironi, L. ^{[1
,2
]}

Pavan, M. ^{[1
,2
]}

Pessina, G. ^{[1
]}

Pirro, S. ^{[1
]}

Previtali, E. ^{[1
]}

机构：

[1] Ist Nazl Fis Nucl, Sez Milano Bicocca, I-20126 Milan, Italy

[2] Univ Milano Bicocca, Dipartimento Fis, I-20126 Milan, Italy

[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

来源：

ASTROPARTICLE PHYSICS | 2010年 / 34卷 / 03期

关键词：

Double Beta Decay; Bolometers; CdWO4; Quenching factor; RELATIVE EFFICIENCY FACTOR; DETECTORS; NEUTRINOS; CUORICINO;

D O I：

10.1016/j.astropartphys.2010.06.009

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the performances of a 0.51 kg CdWO4 scintillating bolometer to be used for future Double Beta Decay Experiments. The simultaneous readout of the heat and the scintillation light allows to discriminate between different interacting particles aiming at the disentanglement and the reduction of background contribution, key issue for next generation experiments. We will describe the observed anticorrelation between the heat and the light signal and we will show how this feature can be used in order to increase the energy resolution of the bolometer over the entire energy spectrum, improving up to a factor 2.6 on the 2615 key line of (TI)-T-208. The detector was tested in a 433 h background measurement that permitted to estimate extremely low internal trace contaminations of Th-232 and U-238. The light yield gamma/beta, alpha's and neutrons is presented. Furthermore we developed a method in order to correctly evaluate the absolute thermal quenching factor of alpha-particles in scintillating bolometers. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：143 / 150

页数：8