Journal
OPTICAL MATERIALS
Volume 49, Issue -, Pages 67-74Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optmat.2015.08.017
Keywords
Double beta decay; Mo-100; Cryogenic scintillating bolometer; ZnMoO4 crystal; Doped scintillator; Scintillation efficiency; Scintillation decay; Luminescence
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Funding
- Agence Nationale de la Recherche (France)
- project Cryogenic detector to search for neutrinoless double beta decay of molybdenum of the Programme Dnipro based on Ukraine-France Agreement on Cultural, Scientific and Technological Cooperation
- ASPERA 2nd Common Call dedicated to RD activities
- Royal Society (London)
- Space Research Program of the National Academy of Sciences of Ukraine
- P2IO LabEx [ANR-10-LABX-0038, ANR-11-IDEX-0003-01]
- STFC [ST/K006517/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/K006517/1] Funding Source: researchfish
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The introduction of a small quantity of tungsten oxide (in the range 0.2-0.5 wt%) into the melt improves the growth of ZnMoO4 crystals. No significant difference in the kinetics of scintillation decay, scintillation efficiency, emission spectra, optical transmittance was observed for three ZnMoO4 crystal samples grown from the melt of stoichiometric composition, with excess of molybdenum and doped with tungsten. Using CaWO4 as reference, the absolute light yield of ZnMoO4 is found to be equal to 3550 +/- 550 ph/MeV at 77 K. For two ZnMoO4 samples 20 mm in diameter and 40 mm in length (grown from the melt of stoichiometric composition and doped with tungsten) it is confirmed that scintillation and bolometric response are similar at milli-Kelvin temperature. (C) 2015 Elsevier B.V. All rights reserved.
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