Development of ZnS(Ag)/plastic dual scintillator sheet for simultaneous alpha- and beta-ray counting

Abstract: Dual scintillator for simultaneous alpha- and beta-ray counting used by detection materials of a surfacecontamination monitor was developed. In this study, preparation method was not a heat melting method buta solvent method, by which the counting material was manufactured by dissolving the polymer materials withsolvent. It was simplified the preparation process. Plastic scintillator for beta-ray counting was prepared bysolidifying the casting solution mixed with organic scintillator, polymer, and solvent. ZnS(Ag) scintillator layerwas prepared by screen printing the paste solution mixed with ZnS(Ag), paste, and solvent onto the plasticlayer. The good counting ability for alpha- and beta-ray using the ZnS(Ag)/plastic dual scintillator preparedand possibility for the counting material of surface contamination monitor was confirmed. Key words : dual scintillator sheet, plastic scintillator, ZnS(Ag), phoswich detector ★ Corresponding authorPhone : +82-(0)42-868-8210 Fax : +82-(0)42-868-2499E-mail : bumja@kaeri.re.kr