Journal of Radiation Industry (방사선산업학회지)

Korean Society of Radiation Industry (한국방사선산업학회)
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Fabrication of 7-Diethylamino-4-methylcoumarin-based Scintillator for Gamma Radiation Detection

7-Diethylamino-4-methylcoumarin 기반 섬광체 제작 및 방사능 검출특성평가

  • Sujung Min (Decommissioning Technology Research Division, Korea Atomic Energy Research Institute) ;
  • Changhyun Roh (Decommissioning Technology Research Division, Korea Atomic Energy Research Institute) ;
  • Bumkyoung Seo (Decommissioning Technology Research Division, Korea Atomic Energy Research Institute) ;
  • Sangbum Hong (Decommissioning Technology Research Division, Korea Atomic Energy Research Institute)
  • 민수정 (한국원자력연구원 해체기술개발부) ;
  • 노창현 (한국원자력연구원 해체기술개발부) ;
  • 서범경 (한국원자력연구원 해체기술개발부) ;
  • 홍상범 (한국원자력연구원 해체기술개발부)
  • Received : 2023.02.19
  • Accepted : 2023.03.17
  • Published : 2023.03.31
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Abstract

Commercially used organic scintillation materials (1,4 di[2-(5phenyloxazolyl)] benzene) have low solubility in solvents and a wide emission energy range, which causes a decrease in detection efficiency. In this study, an organic liquid scintillator with improved detection efficiency was developed using 7-Diethylamino-4-methylcoumarin material to compensate for the disadvantages of existing organic scintillation detectors. And to evaluate the applicability of radiation measurement, the performance of a commercial plastic detector was compared. As a result of analyzing the 60Co detection characteristics by applying 7-Diethylamino-4-methylcoumarin as an alternative to 1,4 di[2-(5phenyloxazolyl)] benzene, the detection efficiency was improved around 2% compared with commercial scintillator when the 7-Diethylamino-4-methylcoumarin content was 0.04 wt%. Based on the results of this study, the possibility of improving detection efficiency through scintillator material modification was confirmed. In addition, since it is possible to discriminate nuclide through the spectrum correction algorithm, it will be possible to inspect and classify various decommissioning wastes generated during the decommissioning process.

Keywords

Acknowledgement

본 연구는 정부(과학기술정보통신부)의 재원으로 한국연구재단(NRF)의 지원을 받아 수행(2022M2E9A2063396와 RS-2022-00154985)되었습니다.

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