Effect of Coating Technique on the Characteristics of ZnS(Ag) Scintillation Composite for Alpha-ray Detection

알파선 측정용 ZnS(Ag) 섬광 복합체의 특성에 있어 도포방법이 미치는 영향

  • Jung, Yeon-Hee (Department of Chemical Engineering, Chungnam University) ;
  • Park, So-Jin (Department of Chemical Engineering, Chungnam University) ;
  • Seo, Bum-Kyoung (Division of Decommissioning Technology Development, Korea Atomic Energy Research Institute) ;
  • Lee, Kune Woo (Division of Decommissioning Technology Development, Korea Atomic Energy Research Institute) ;
  • Han, Myeong-Jin (Department of Chemical Engineering, Kyungil University)
  • 정연희 (충남대학교 화학공학과) ;
  • 박소진 (충남대학교 화학공학과) ;
  • 서범경 (한국원자력연구소 제염해체기술연구부) ;
  • 이근우 (한국원자력연구소 제염해체기술연구부) ;
  • 한명진 (경일대학교 생명화학공학과)
  • Received : 2006.07.25
  • Accepted : 2006.10.02
  • Published : 2006.12.10

Abstract

Polymer composites for measuring the radioactive contamination are prepared by coating ZnS(Ag) powders as a scintillator on polysulfone base layer. The composites consist of the active layer for a scintillation reaction with radioactive wastes and the transparent support layer for transmittance of light photons emitted by scintillation in the active layer. The binding of the active layer, including ZnS(Ag), on the support layer is proceeded via coating with polysulfone as a binder, without any extra adhesive. The coating was obtained by either casting via a Doctor Blade as applicator or screen printing. The prepared composites feature a monolithic structure, resulting in the complete adhesion between two layers. The composite prepared by the casting technique using an applicator holds a good detection efficiency in measuring the alpha radionuclide, but its structure becomes fragile because of warping in morphology. On the contrary, the composite prepared by the screen printing shows a good detection capacity as well as a good stability in a mechanical shape.

Keywords

radioactive contamination;alpha particle;scintillator;polymer composite;radiation detection

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