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Search for radiation-resistant compositions of plastic scintillation detectors

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6 Author(s)
O. A. Gunder ; Inst. for Single Crystals, Acad. of Sci., Kharkov, Ukraine ; I. V. Kopina ; V. D. Titskaya ; A. V. Kuznichenko
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The performed investigations were aimed at the modification of polystyrene matrix and the search for radiation-resistant luminescent additions (LA) with optimal optical characteristics. The relative changes of scintillation efficiency (N/N0) and the transparency to the scintillator's own radiation light (T/T0) were taken as the criterion for the radiation-resistance of the detectors. Polystyrene matrix was modified by the following ways: a) the copolymerization of styrene with bifunctional monomers and vinylated LA; b) the introduction of secondary solvent or the increase of the concentration of primary LA; c) the introduction of high-reactivity compounds promoting the destruction of stable macroradicals formed in the detectors in the process of γ-irradiation. Proposed was a special method for the purification of LA. The optimal composition of the plastic scintillator detectors was characterized by the following values: N/N0=0.75; T/T0=0.86

Published in:

Nuclear Science Symposium and Medical Imaging Conference, 1994., 1994 IEEE Conference Record  (Volume:1 )

Date of Conference:

30 Oct-5 Nov 1994