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

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)
Publication Information
Applied Chemistry for Engineering / v.17, no.6, 2006 , pp. 604-608 More about this Journal
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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