https://doi.org/10.1140/epjc/s10052-016-4331-2
Regular Article - Experimental Physics
First test of an enriched
CdWO
scintillating bolometer for neutrinoless double-beta-decay searches
1
National Research Centre “Kurchatov Institute”, ITEP, 117218, Moscow, Russia
2
Institute for Nuclear Research, MSP, Kyiv, 03680, Ukraine
3
CSNSM, Univ. Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, 91405, Orsay, France
4
Department of Physics and Electrical Engineering, Linnaeus University, 391 82, Kalmar, Sweden
5
DISAT, Università dell’Insubria, 22100, Como, Italy
6
CEA Saclay, DSM/IRFU, 91191, Gif-sur-Yvette Cedex, France
7
Nikolaev Institute of Inorganic Chemistry, 630090, Novosibirsk, Russia
8
INFN, sezione di Roma, 00185, Rome, Italy
9
Presently at Max-Planck-Institut für Physik, 80805, Munich, Germany
* e-mail: andrea.giuliani@csnsm.in2p3.fr
Received:
28
June
2016
Accepted:
22
August
2016
Published online:
3
September
2016
For the first time, a cadmium tungstate crystal scintillator enriched in Cd has been succesfully tested as a scintillating bolometer. The measurement was performed above ground at a temperature of 18 mK. The crystal mass was 34.5 g and the enrichment level
82 %. Despite a substantial pile-up effect due to above-ground operation, the detector demonstrated high energy resolution (2–7 keV FWHM in 0.2–2.6 MeV
energy range and 7.5 keV FWHM at the
Cd double-beta decay transition energy of 2813 keV), a powerful particle identification capability and a high level of internal radio-purity. These results prove that cadmium tungstate is a promising detector material for a next-generation neutrinoless double-beta decay bolometric experiment, like that proposed in the CUPID project (CUORE Upgrade with Particle IDentification).
© The Author(s), 2016