自発的に放射される特徴的なX線を測定することによって,傷のスワンにアクティニドを検出する
Yudai Ogawa1, Ukyou Yanagisawa2, Hui Wang3
1University of Fukui, Fukui, Fukui Prefecture, JAPAN.
まとめ
傷におけるアクティニドによる偶然の汚染は,血液による影響を受けないX線測定を用いて検出できます. この新しい方法は 携帯可能な装置で 敏感なプルトニウム検出を可能にします
科学分野:
- 核化学
- 医学物理学
- 放射線検出
背景:
- 核燃料を扱う事故で 作業員の傷はアクティニドに汚染されることがあります
- 現在のアルファ粒子の検出方法は 体液の遮断によって制限されています
- アクチニドは特徴的なX線を放射し,アルファ粒子よりも強い.
研究 の 目的:
- アクティニドの汚染測定に対する血液の影響を評価する.
- 傷でアクティニドを検出する 敏感で携帯可能な方法を開発する.
- アルファ粒子検出の代替としてX線検出を評価する.
主な方法:
- 血液とアメリシウム241のサンプルを使用しました.
- アルファ粒子とX線放射を測定した.
- 血の無いX線測定はプルトニウム239/240とアメリシウム241で行われた.
- ピークフィッティングは,異なるアクティニドから信号を分離するために使用されました.
主要な成果:
- アルファ粒子の測定とは異なり,血液はX線測定に影響を与えなかった.
- プルトニウムとアメリシウムの信号は X線スペクトルでうまく分離されました
- プルトニウムの検出限界は約18.8Bqが300秒で達成されました.
- この方法はサンプルを事前処理せずに高い感度と精度を示した.
結論:
- X線検知は,血に感染していない傷のアクティニド汚染の有効な代替手段です.
- 開発された方法は,傷のサンプルでプルトニウムとアメリシウムを敏感に検出することができます.
- ポータブルデバイスは,アクティニド汚染の迅速な現場評価に利点があります.
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