Radiation-induced chemical processes in polystyrene scintillators

被引：13
作者：
Milinchuk, VK
Bolbit, HM
Klinshpont, ER
Tupikov, VI
Zhdanov, GS
Taraban, SB
Shelukhov, IP
Smoljanskii, AS
机构：
[1] Obninsk Phys & Power Engn Inst, Obninsk 249020, Kaluga Region, Russia
[2] State Res Ctr Russian Federat, Karpov Inst Phys Chem, Obninsk 249020, Kaluga Region, Russia
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 1999年 / 151卷 / 1-4期
关键词：
ionizing radiation; polymeric scintillator; macroradical; radiation resistance;
D O I：
10.1016/S0168-583X(99)00096-8
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The regularities established for macroradical accumulation and intensity of radioluminescence under gamma-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. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：457 / 461
页数：5
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