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제114회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Simultaneous measurement of thermal ionization mass spectrometry for high accuracy and precision in isotopic analysis of uranium and its application to nuclear safeguards and nuclear forensics

2014년 8월 28일 16시 11분 13초
ANAL1-3 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
목 10시 : 30분
분석화학 - Analytical Chemistry for Environmental & Forensic Sciences
저자 및
박종호*, 송규석
한국원자력연구원 원자력화학연구부, Korea
A thermal ionization mass spectrometer (TIMS) equipped with a multiple collector system was utilized for the study on the measurement accuracy and precision based on the detection methods and the amounts of uranium. Various amounts of samples were loaded in the mass spectrometer followed by being measured with three different detection configurations, which were multi-dynamic, dynamic, and simultaneous static detection methods. Only static detection method enabled us to ensure reliable accuracy and precision for the isotopic measurement of the uranium with 1 pg, which corresponds to the amount of uranium contained in a typical single-particle collected from a nuclear facility. Examples for isotopic analysis of uranium single-particles performed by TIMS with fission-track (FT) or scanning electron microscopy coupled with energy dispersive X-ray spectroscopy (SEM-EDS) techniques were shown as applications of this study to nuclear safeguards and nuclear forensics. The excellent agreement of the measurement with the certified value showed our single-particle analysis based on FT-TIMS and SEM-TIMS measurements suitable for the analysis of unknown uranium particles with high precision and accuracy.