Radiation-induced chemical processes in polystyrene scintillators

The regularities established for macroradical accumulation and intensity of radioluminescence under γ-irradiation of a polystyrene scintillator prove benzyl macroradicals to be efficient quenchers of the excited scintillator molecules. Dissolved oxygen was determined to have a constant of the quench...

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Published in:	Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Vol. 151; no. 1; pp. 457 - 461
Main Authors:	Milinchuk, V.K, Bolbit, N.M, Klinshpont, E.R, Tupikov, V.I, Zhdanov, G.S, Taraban, S.B, Shelukhov, I.P, Smoljanskii, A.S
Format:	Journal Article
Language:	English
Published:	Elsevier B.V 01-05-1999
Subjects:	Ionizing radiation Macroradical Polymeric scintillator Radiation resistance Radiation resistance 61.80.E Ionizing radiation 82.50 78.60.Y Polymeric scintillator Macroradical 29.40.M 61.82.P
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Summary:	The regularities established for macroradical accumulation and intensity of radioluminescence under γ-irradiation of a polystyrene scintillator prove benzyl macroradicals to be efficient quenchers of the excited scintillator molecules. Dissolved oxygen was determined to have a constant of the quenching rate 100 times lower than that of macroradicals. Oxygen is an efficient antirad because of participating in oxidation reactions and subsequent recombination of macroradicals. The method was developed to obtain a polymeric scintillator with a polystyrene matrix containing a dispersed system of pores and channels. Radiation resistance of such a scintillator is 5–10 times higher than that of standard types.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0168-583X 1872-9584
DOI:	10.1016/S0168-583X(99)00096-8