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The CUPID-Mo experiment for neutrinoless double-beta decay: performance and prospects

“…We systematically evaluate the α discrimination level following Refs. [52,28,29] and report the discrimination of α versus γ/β events in terms of the discrimination power (DP) at the Q-value for 0νβ β in 100 Mo…”

“…We obtain detector based values µ α = QF α · µ γ from the measured µ γ and approximate the very uniform light quenching of α events with QF α = 0.2 (see Table 13 3). The expected LD resolutions σ α and σ γ at the endpoint of the 100 Mo decay are extrapolated by adding the baseline resolution and a statistical photon noise component with an average photon energy of 2.07 eV [52] in quadrature. The resulting median discrimination power is 15.0, with the worst-performing detector having a discrimination power of 6.3.…”

Production and characterisation of a $$\hbox {PbMoO}_4$$ cryogenic detector from archaeological Pb

“…A clear particle identification on the heat channel can be performed. This feature is characteristic of Mo-based compound as already demonstrated for CaMoO 4 [38], Li 2 MoO 4 [11] and ZnMoO 4 [35]. The driving mechanism for such behaviour relies on the slow scintillation time of Mo-based crystal (hundreds of µsec) and on the slow signal development of cryogenic detectors (rise time of few msec), details can be found in [39].…”

Rejection of randomly coinciding events in Li $$_2^{100}\mathrm{MoO}_4$$ 2 100 MoO 4 scintillating bolometers using light detectors based on the Neganov–Luke effect

“…In this work, we will consider Ge wafers with a diameter of 44 mm and a thickness of 0.17 mm, as those used by the LUCIFER and LUMINEU collaborations in their pilot experiments. In general, the performances of these light detectors present a significant spread, due to a difficult reproduction of the thermal couplings among detector elements, but they are always largely sufficient to separate α and β particles in the region of interest for 0ν2β decay of 100 Mo (around 3034 keV), exploiting their different light yields [30,32].…”

“…Recently, lithium molybdate (Li 2 MoO 4 ) crystal scintillators were successfully tested as scintillating bolometers [25,26]. Subsequently, a technique to grow largevolume, high-quality Li 2 MoO 4 crystal scintillators with low radioactive contamination -embedding also enriched 100 Mo -was developed in the framework of the LUMINEU [27,28] and ISOTTA [29] projects with outstanding results [30,31]. This makes this material very promising for 0ν2β experiments with 100 Mo.…”