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Fission track-secondary ion mass spectrometry as a tool for detecting the isotopic signature of individual uranium containing particles

フィッショントラック-二次イオン質量分析法による単一ウラン粒子の同位体組成分析

江坂 文孝 ; Lee, C. G.; 間柄 正明 ; 木村 貴海 

Esaka, Fumitaka; Lee, C. G.; Magara, Masaaki; Kimura, Takaumi

個々のウラン粒子の二次イオン質量分析(SIMS)における試料前処理法としてフィッショントラック法を用いる方法を開発した。実際に原子力施設において採取された拭き取り試料に対して本法を適用したところ、フィッショントラック法を用いた場合に、より濃縮度の高いウラン粒子を効率的に検出し分析することができた。本法は、環境試料中のより濃縮度の高いウランの検出及び分析に有効である。

A fission track technique was used as a sample preparation method for subsequent isotope abundance ratio analysis of individual uranium containing particles with secondary ion mass spectrometry (SIMS) to measure the particles with higher enriched uranium efficiently. This method was then applied to the analysis of a real inspection swipe sample taken at a nuclear facility. As a consequence, the range of $$^{235}$$U/$$^{238}$$U isotope abundance ratio between 0.0276 and 0.0438 was obtained, which was higher than that measured by SIMS without using a fission track technique (0.0225 and 0.0341). This indicates that the fission track - SIMS method is a powerful tool to identify the particle with higher enriched uranium in environmental samples efficiently.

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パーセンタイル:72.04

分野:Chemistry, Analytical

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