Li2MoO4 Crystals Grown by Low-Thermal-Gradient Czochralski Technique

Grigorieva, V. D.; Shlegel, V.N.; Bekker, Tatyana B.; Ivannikova, N. V.; Giuliani, A.; Marcillac, P. de; Marnieros, S.; Novati, V.; Olivieri, E.; Poda, D.V.; Nones, C.; Zolotarova, A.; Danevich, F.A.

doi:10.17265/2161-6221/2017.3-4.002

Cited by 17 publications

(10 citation statements)

References 27 publications

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“…The Li 2 100 MoO 4 crystals are (97.7 ± 0.3)% enriched in 100 Mo and have a cubic shape with a 45 mm side and mass of ∼ 280 g. The growth of the eight Li 2 MoO 4 crystals containing molybdenum enriched in the isotope 100 Mo was performed within the CROSS project [55], following the protocol set up by LUMINEU [46,47]. Due to restrictions imposed by the dimensions of the crucible used for the crystals growth, the edges of the Li 2 100 MoO 4 samples were rounded.…”

Section: The 8-crystal Prototypementioning

confidence: 99%

“…The combination of scintillating bolometers and high Q ββ value emitters was developed by the LUCIFER [34][35][36][37][38][39][40][41] and LUMINEU [42][43][44][45][46][47][48] projects, as well as by the AMoRE Collaboration [49]. The outcomes of LUCIFER and LUMINEU were two medium-scale demonstrators, CUPID-0 [3,4,19,[50][51][52] and CUPID-Mo [21,48,53,54] respectively.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of cubic Li$$_{2}$$$$^{100}$$MoO$$_4$$ crystals for the CUPID experiment

Armatol¹,

Armengaud²,

Armstrong³

et al. 2021

Eur. Phys. J. C

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The CUPID Collaboration is designing a tonne-scale, background-free detector to search for double beta decay with sufficient sensitivity to fully explore the parameter space corresponding to the inverted neutrino mass hierarchy scenario. One of the CUPID demonstrators, CUPID-Mo, has proved the potential of enriched Li$$_{2}$$ 2 $$^{100}$$ 100 MoO$$_4$$ 4 crystals as suitable detectors for neutrinoless double beta decay search. In this work, we characterised cubic crystals that, compared to the cylindrical crystals used by CUPID-Mo, are more appealing for the construction of tightly packed arrays. We measured an average energy resolution of ($$6.7\pm 0.6$$ 6.7 ± 0.6 ) keV FWHM in the region of interest, approaching the CUPID target of 5 keV FWHM. We assessed the identification of $$\alpha $$ α particles with and without a reflecting foil that enhances the scintillation light collection efficiency, proving that the baseline design of CUPID already ensures a complete suppression of this $$\alpha $$ α -induced background contribution. We also used the collected data to validate a Monte Carlo simulation modelling the light collection efficiency, which will enable further optimisations of the detector.

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Section: The 8-crystal Prototypementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Characterization of cubic Li$$_{2}$$$$^{100}$$MoO$$_4$$ crystals for the CUPID experiment

Armatol¹,

Armengaud²,

Armstrong³

et al. 2021

Eur. Phys. J. C

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“…The nine most recent crystals from "Fomos Materials", produced in 2015 to 2016, have a lower background level in the ROI (< 10 −3 counts•keV −1 •kg −1 •yr −1 ) than that for the previously produced ones (< 10 −2 counts•keV −1 •kg −1 •yr −1 ). The five Li 100 2 MoO 4 crystals comprise four produced by Nikolaev Institute of Inorganic Chemistry (NIIC) and one produced at the Center for Underground Physics (CUP) [23][24][25][26]. The Li 100 2 MoO 4 crystals are candidates for AMoRE-II, depending on their performance, background levels, and operating stability in AMoRE-I.…”

Section: Amore-imentioning

confidence: 99%

AMoRE: a search for neutrinoless double-beta decay of ¹⁰⁰Mo using low-temperature molybdenum-containing crystal detectors

Lee

2020

J. Inst.

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The AMoRE is an experiment to search for neutrinoless double-beta decay of 100Mo in molybdate crystal scintillators using a cryogenic detection technique. The crystals are equipped with metallic magnetic calorimeter (MMC) sensors that detect both phonon and photon signals at temperatures of a few tens of mK. Simultaneous measurements of thermal and scintillation signals produced by particle interactions in the crystals by MMC sensors provide high energy resolution and efficient particle discrimination. AMoRE-Pilot, an R&D phase with six 48deplCa100MoO4 crystals and a total mass of ∼1.9 kg in the final configuration, operated at the 700 m deep Yangyang underground laboratory (Y2L). After completion of the AMoRE-Pilot run at the end of 2018, AMoRE-I with a ∼6 kg crystal array comprised of thirteen 48deplCa100MoO4 and five Li2100MoO4 crystals is currently being assembled and installed at Y2L. We have secured 110 kg of 100Mo-isotope-enriched MoO3 powder for the production of crystals for the AMoRE-II phase, which will have ∼200 kg of molybdate crystals and operate at Yemilab, a new underground laboratory located ∼1,100 m deep in the Handeok iron mine that is currently being excavated and with a scheduled completion date of December 2020. AMoRE-II is expected to improve the upper limit on the effective Majorana neutrino mass to cover the entire inverted hierarchy neutrino mass region: 20–50 meV, in the case when no such decays are observed. Results from AMoRE-Pilot and progress of the preparations for AMoRE-I and AMoRE-II are presented.

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“…The technology of Li 2 100 MoO 4 low-temperature detectors with phonon-scintillation dual readout, using complementary thin Ge bolometers for photon detection, has been proposed in [46,47], developed by the LUMINEU [48][49][50] and validated on a larger scale by the CUPID-Mo [51][52][53] collaborations. In both LUMINEU and CUPID-Mo experiments -realized respectively with 4-crystal [48,50] and 20-crystal [51] arrays operated in the EDELWEISS setup at the Modane underground laboratory in France -cylindrical crystals (⊘44 × 45 mm, ∼ 0.21 kg, 100 Mo enrichment ∼ 97%) have been used.…”

Section: Introductionmentioning

confidence: 99%

“…Cubic crystals have been selected for CUPID [45] as well for CROSS (Cryogenic Rare-event Observatory with Surface Sensitivity), a project to demonstrate the potential of metal-coated bolometers capable of particle identification of near surface interactions [54][55][56][57][58][59]. Several cubic lithium molybdate samples with a size of 45 × 45 × 45 mm each -produced following the LUMINEU crystals fabrication protocol [48,49,60] -have been recently operated by CROSS and CUPID collaborations at the Canfranc underground laboratory (LSC) in Spain [61], and at the LNGS [62,63]. The results of these tests confirm LU-MINEU and CUPID-Mo findings on high energy resolution, high crystal radiopurity, and an efficient scintillation-assisted particle identification despite the modest light output of the material [33,48,51].…”

Section: Introductionmentioning

confidence: 99%

Twelve-crystal prototype of Li₂MoO₄ scintillating bolometers for CUPID and CROSS experiments

et al. 2023

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An array of twelve 0.28 kg lithium molybdate (LMO) low-temperature bolometers equipped with 16 bolometric Ge light detectors, aiming at optimization of detector structure for CROSS and CUPID double-beta decay experiments, was constructed and tested in a low-background pulse-tube-based cryostat at the Canfranc underground laboratory in Spain. Performance of the scintillating bolometers was studied depending on the size of phonon NTD-Ge sensors glued to both LMO and Ge absorbers, shape of the Ge light detectors (circular vs. square, from two suppliers), in different light collection conditions (with and without reflector, with aluminum coated LMO crystal surface). The scintillating bolometer array was operated over 8 months in the low-background conditions that allowed to probe a very low, μBq/kg, level of the LMO crystals radioactive contamination by 228Th and 226Ra.

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Li2MoO4 Crystals Grown by Low-Thermal-Gradient Czochralski Technique

Cited by 17 publications

References 27 publications

Characterization of cubic Li$$_{2}$$$$^{100}$$MoO$$_4$$ crystals for the CUPID experiment

Characterization of cubic Li$$_{2}$$$$^{100}$$MoO$$_4$$ crystals for the CUPID experiment

AMoRE: a search for neutrinoless double-beta decay of ¹⁰⁰Mo using low-temperature molybdenum-containing crystal detectors

Twelve-crystal prototype of Li₂MoO₄ scintillating bolometers for CUPID and CROSS experiments

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Li2MoO4 Crystals Grown by Low-Thermal-Gradient Czochralski Technique

Cited by 17 publications

References 27 publications

Characterization of cubic Li$$_{2}$$$$^{100}$$MoO$$_4$$ crystals for the CUPID experiment

Characterization of cubic Li$$_{2}$$$$^{100}$$MoO$$_4$$ crystals for the CUPID experiment

AMoRE: a search for neutrinoless double-beta decay of 100Mo using low-temperature molybdenum-containing crystal detectors

Twelve-crystal prototype of Li2MoO4 scintillating bolometers for CUPID and CROSS experiments

Contact Info

Product

Resources

About

AMoRE: a search for neutrinoless double-beta decay of ¹⁰⁰Mo using low-temperature molybdenum-containing crystal detectors

Twelve-crystal prototype of Li₂MoO₄ scintillating bolometers for CUPID and CROSS experiments