Study on preparation of a thin film type of ZnS(Ag) scintillator sheet for alpha-ray detection

The detector consisted of ZnS(Ag) scintillator and PhotoMultiplier Tube (PMT) is widely used as contamination monitor in the nuclear facilities. Such detectors are mainly manufactured by adgering the ZnS(Ag) power onto the transparent plastic. In this study the preparation condition for Zns(Ag) csintillator sheet using a simple method was established. The scintillator sheet was composed with a support polymer sheet and ZnS(Ag) scintillator layer. The base sheet was prepared by casting the polymer solution after solving the polymer with solvent and the scintillator layer was manufactured by printing the mixture solution with ZnS(Ag) and paste. It was found that the polysulfone(PSf) as a polymer for the base sheet and a cyano resin as a paste for adhering the ZnS(Ag) scintillator was suitable. Also, the prepared thin scintillator sheet had a sufficient mechanical strength, a optical transparency and an alpha-ray detection performance