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2019 Fiscal Year Final Research Report

Development of a new X-ray fluorescence analysis system that enables low-level radioactivity measurement of uranium

Research Project

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Project/Area Number 17K00563
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Risk sciences of radiation and chemicals
Research InstitutionNational Institutes for Quantum and Radiological Science and Technology

Principal Investigator

Yoshii Hiroshi  国立研究開発法人量子科学技術研究開発機構, 高度被ばく医療センター 計測・線量評価部, 主幹研究員(定常) (20334047)

Co-Investigator(Kenkyū-buntansha) 伊豆本 幸恵  国立研究開発法人量子科学技術研究開発機構, 放射線医学総合研究所 計測・線量評価部, 研究員(任非) (20731798)
酒井 康弘  東邦大学, 理学部, 教授 (90235127)
Project Period (FY) 2017-04-01 – 2020-03-31
Keywords蛍光X線分析 / 全反射蛍光X線分析 / ウラン
Outline of Final Research Achievements

In order to efficiently analyze uranium in various forms of samples, we have developed a new measurement device that can perform X-ray fluorescence (XRF) and total reflection X-ray fluorescence (TXRF) measurements. The XRF measurement can be changed to the TXRF measurement simply by changing the collimator, rotating the sample, and sliding the detector. We searched for the optimum filter configuration for the measurement of Lα and Lβ lines of uranium, and decided on copper foil of 80 μm and 100 μm, respectively. In addition, for the sample with a rubidium content of 10 times the uranium content or more, the analysis should be performed using the Lβ line instead of the Lα line that overlaps the rubidium peak. The detection limits for XRF and TXRF measurements were about 0.4 and 0.01 μg, respectively.

Free Research Field

放射線計測

Academic Significance and Societal Importance of the Research Achievements

XRF分析とTXRF分析を一つの装置の中で両立できるシステムはこれまでに実用化されたことがなく、このシステムの実現によって物品の汚染検査、排水管理、環境モニタリングを1台の装置で実施できるようになる。また、本研究で行ったような、ウランに特化したフィルター構成の探索を行う研究はこれまでにほとんど行われていなかった。標的元素を特定し、その標的元素に特化したフィルター構成を探索するための本研究において構築した手法は、広く蛍光X線分析分野で活用されうる。

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Published: 2021-02-19  

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