Enriched Zn${}^{100}$MoO${}_4$ scintillating bolometers to search for $0\nu 2\beta$ decay of ${}^{100}$Mo with the LUMINEU experiment

Abstract

The LUMINEU project aims at performing a demonstrator underground experiment searching for the neutrinoless double beta decay of the isotope ${}^{100}$Mo embedded in zinc molybdate (ZnMoO${}_4$) scintillating bolometers. In this context, a zinc molybdate crystal boule enriched in ${}^{100}$Mo to 99.5\% with a mass of 171 g was grown for the first time by the low-thermal-gradient Czochralski technique. The production cycle provided a high yield (the crystal boule mass was 84\% of initial charge) and an acceptable level -- around 4\% -- of irrecoverable losses of the costy enriched material. Two crystals of 59 g and 63 g, obtained from the enriched boule, were tested aboveground at milli-Kelvin temperature as scintillating bolometers. They showed a high detection performance, equivalent to that of previously developed natural ZnMoO${}_4$ detectors. These results pave the way to future sensitive searches based on the LUMINEU technology, capable to approach and explore the inverted hierarchy region of the neutrino mass pattern.

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Cited by in corpus (22)

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• Development of ${}^{100}$Mo-containing scintillating bolometers for a high-sensitivity neutrinoless double-beta decay search
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• Analysis of cryogenic calorimeters with light and heat read-out for double beta decay searches
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• Phenomenology of neutrinoless double beta decay
• Radiopure tungstate and molybdate crystal scintillators for double beta decay experiments
• First test of an enriched ${}^{116}$CdWO${}_4$ scintillating bolometer for neutrinoless double-beta-decay searches
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• Scintillating bolometers based on ZnMoO${}_4$ and Zn${}^{100}$MoO${}_4$ crystals to search for 0$\nu$2$\beta$ decay of ${}^{100}$Mo (LUMINEU project): first tests at the Modane Underground Laboratory
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• ZnO-based scintillating bolometers: New prospects to study double beta decay of ${}^{64}$Zn
• Aboveground test of an advanced Li${}_2$MoO${}_4$ scintillating bolometer to search for neutrinoless double beta decay of ${}^{100}$Mo
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