First test of an enriched ${}^{116}$CdWO${}_4$ scintillating bolometer for neutrinoless double-beta-decay searches

Abstract

For the first time, a cadmium tungstate crystal scintillator enriched in ${}^{116}$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 a high energy resolution (2-7 keV FWHM in 0.2-2.6 MeV $\gamma$ energy range), a powerful particle identification capability and a high level of internal radiopurity. These results prove that cadmium tungstate is an extremely 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).

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Cited by in corpus (10)

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• Improvement of radiopurity level of enriched ${}^{116}$CdWO${}_4$ and ZnWO${}_4$ crystal scintillators by recrystallization
• Low background techniques in bolometers for double-beta decay search
• First scintillating bolometer tests of a CLYMENE R&D on Li${}_2$MoO${}_4$ scintillators towards a large-scale double-beta decay experiment
• Radioactive contamination of scintillators
• Radiopure tungstate and molybdate crystal scintillators for double beta decay experiments
• Potentialities of the future technical improvements in the search of rare nuclear decays by bolometers
• Double Beta Decay APPEC Committee Report
• Test of ${}^{116}$CdWO${}_4$ and Li${}_2$MoO${}_4$ scintillating bolometers in the CROSS underground facility with upgraded detector suspension
• First test of a $\mathrm{CdMo}{\mathrm{O}}_4$ scintillating bolometer for neutrinoless double beta decay experiments with ${}^{116}\mathrm{Cd}$ and ${}^{100}\mathrm{Mo}$ nuclides