Application of PbWO4 crystal scintillators in experiment to search for double beta decay of 116Cd
F. A. Danevich, A. Sh. Georgadze, V. V. Kobychev, B. N. Kropivyansky, S. S. Nagorny, A. S. Nikolaiko, D. V. Poda, V. I. Tretyak, S. S. Yurchenko, B. V. Grinyov, L. L. Nagornaya, E. N. Pirogov, V. D. Ryzhikov, V. B. Brudanin, M. Fedorov, M. Korzhik, A. Lobko, O. Miussevitch, I. M. Solsky
Abstract
PbWO4 crystal scintillators are discussed as an active shield and light-guides in 116Cd double beta decay experiment with CdWO4 scintillators. Scintillation properties and radioactive contamination of PbWO4 scintillators were investigated. Energy resolution of CdWO4 detector, coupled to PbWO4 crystal as a light-guide, was tested. Efficiency of PbWO4-based active shield to suppress background from the internal contamination of PbWO4 crystals was calculated. Using of lead tungstate crystal scintillators as high efficiency 4-pi active shield could allow to build sensitive double beta experiment with 116CdWO4 crystal scintillators.
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