Radioactive contamination of CaWO4, ZnWO4, CdWO4, and Gd2SiO5:Ce crystal scintillators

Radioactive contaminations of CaWO4, ZnWO4, CdWO4, and Gd2SiO5:Ce crystal scintillators were measured in the Solotvina Underground Laboratory. The Monte Carlo simulation of contributing radioactive sources, the time-amplitude and pulse-shape analyses of the experimental data were applied. CaWO4 and...

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Bibliographic Details
Published in:AIP conference proceedings 2005-09, Vol.785 (1)
Main Authors: Danevich, F.A., Georgadze, A.Sh, Kobychev, V.V., Kropivyansky, B.N., Nagorny, S.S., Nikolaiko, A.S., Poda, D.V., Tretyak, V.I., Zdesenko, S.Yu, Zdesenko, Yu.G., Bizzeti, P.G., Fazzini, T.F., Maurenzig, P.R., INFN, 50019 Florence, Solsky, I.M., Brudanin, V.B., Avignone, F.T. III
Format: Article
Language:English
Subjects:
BETA DECAY
CADMIUM 113
CADMIUM 116
CADMIUM TUNGSTATES
CALCIUM TUNGSTATES
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
COMPUTERIZED SIMULATION
CONTAMINATION
CRYSTALS
GADOLINIUM 152
GADOLINIUM COMPOUNDS
MONTE CARLO METHOD
PULSE SHAPERS
RADIATION SOURCES
SCINTILLATIONS
SILICATES
SOLID SCINTILLATION DETECTORS
THORIUM
TUNGSTEN 180
URANIUM
ZINC TUNGSTATES
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Summary:Radioactive contaminations of CaWO4, ZnWO4, CdWO4, and Gd2SiO5:Ce crystal scintillators were measured in the Solotvina Underground Laboratory. The Monte Carlo simulation of contributing radioactive sources, the time-amplitude and pulse-shape analyses of the experimental data were applied. CaWO4 and GSO scintillators are considerably polluted by uranium and thorium, while the total {alpha} activity in ZnWO4 and CdWO4 scintillators does not exceed the level of a few mBq/kg. Particular radioactivity was observed in CaWO4 ({alpha} active 180W), CdWO4 ({beta} active 113Cd, 2v2{beta} decay of 116Cd, 180W), and GSO ({alpha} active 152Gd) detectors. The radioactive contamination of the studied scintillation crystals is compared with that of commonly used detectors.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.2060457