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Development and properties of cadmium and lead tungstate low-background scintillators for double beta decay experiments
G. P. Kovtun1, R. S. Boiko2, F. A. Danevich2, B. N. Kropivyansky2, V. M. Mokina2, T. S. Potina1, D. A. Solopikhin1, I. A. Tupitsyna3, A. P. Shcherban1, V. N. Shlegel4
1National Science Center "Kharkov Institute of Physics and Technology", Kharkiv, Ukraine
2Institute for Nuclear Research, National Academy of Sciences of Ukraine, Kyiv, Ukraine
3Institute for Scintillation Materials, National Academy of Sciences of Ukraine, Kharkiv, Ukraine
4Nikolaev Institute of Inorganic Chemistry, Russian Academy of Sciences, Novosibirsk, Russia
Abstract: Methods of deep purification of natural and isotopically enriched cadmium (Cd, 106Cd, 116Cd), as well as of archaeological lead (archPb), to produce cadmium and lead tungstate crystal scintillators have been developed. The basic stages of development and characteristics of the scintillators are described. The developed methods of initial materials purification and crystal growth can be used for the production of scintillators for large-scale high sensitivity experiments to search for rare events (double beta decay, dark matter, rare alpha and beta decays).
Keywords: scintillator, scintillation detector, refining, cadmium, isotopes of cadmium, archaeological lead, double beta decay.
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