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arXiv · 1606.07806

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

A. S. Barabash·F. A. Danevich·Y. Gimbal-Zofka·A. Giuliani·S. I. Konovalov·M. Mancuso·P. de Marcillac·S. Marnieros·V. Novati·G. Pessina·D. V. Poda·O. G. Polischuk·V. N. Shlegel·V. I. Tretyak·V. I. Umatov·A. S. Zolotarova
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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 $γ$ 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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A. S. Barabash, F. A. Danevich, Y. Gimbal-Zofka, A. Giuliani, S. I. Konovalov, M. Mancuso, P. de Marcillac, S. Marnieros, V. Novati, G. Pessina, D. V. Poda, O. G. Polischuk, V. N. Shlegel, V. I. Tretyak, V. I. Umatov, A. S. Zolotarova. 2016-06-24. First test of an enriched $^{116}$CdWO$_4$ scintillating bolometer for neutrinoless double-beta-decay searches. https://doi.org/10.1140/epjc%2Fs10052-016-4331-2

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