量研学術機関リポジトリ「QST-Repository」は、国立研究開発法人 量子科学技術研究開発機構に所属する職員等が生み出した学術成果（学会誌発表論文、学会発表、研究開発報告書、特許等）を集積しインターネット上で広く公開するサービスです。 Welcome to QST-Repository where we accumulates and discloses the academic research results(Journal Publications, Conference presentation, Research and Development Report, Patent, etc.) of the members of National Institutes for Quantum Science and Technology.
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For decontamination in Fukushima evacuated areas, a considerable number of low-cost, efficient radiation detectors such as survey meters will be needed in the coming years. We developed a polyethylene naphthalate based scintillator
(ⓇSCINTIREX) recently. It is a plastic scintillator that emits sufficient fluorescent light upon exposure to radiation without the need for wavelength shifting, thus reducing costs of the survey meters. We tested the performance using a OKEN survey meter with a 1 mm thick polyethylene naphthalate sheet, and found that the count rate for a 36Cl source and a 60Co source can be more than doubled when the plastic surface is modified to allow more light to reach the photo detector.
Radiation counting characteristics on surface-modified polyethylene naphthalate scintillators
