合成和对同位素条形码,和标签的特征,用于故意的核取证
Rachel Bergin1, Kyle Samperton1, Michael Bronikowski1
1Savannah River National Laboratory, Aiken, SC, 29808, USA.
Talanta
|December 25, 2024
概括
蓄意核取证使用独特的同位素比"条形码"来追踪核材料. 这项研究合成了,和标签,证明了材料来源确定的一种可行的方法.
科学领域:
- 核化学 核化学 核化学
- 材料科学 材料科学 材料科学
- 分析化学 分析化学
背景情况:
- 核取证学旨在确定非法核材料的来源.
- 目前的方法可以耗费大量时间来确定来源.
- 蓄意核取证建议在核材料上添加可追溯的签名.
研究的目的:
- 合成和表征稳定同位素标记物用于有意的核取证.
- 开发一种方法来创建独特的同位素比率"条形码".
- 评估这些条形码用于跟踪核材料的可行性.
主要方法:
- 使用双尖机制合成 (Ni), (Mo) 和 (W) 的标物种.
- 为每个元素准备alpha (α) 和beta (β) 标签物种.
- 高精度同位素分析使用多采集器感应合等离子体质谱法 (MC-ICP-MS).
主要成果:
- 成功合成了具有扰乱同位素比率的Ni,Mo和W标签物种.
- 与自然成分相比,达到的同位素扰动范围从数百到数千个百米 (‰).
- 证明合成的标记物可以从自然的同位素组成和彼此中分解.
结论:
- 合成的标记物和"条形码"概念显示了核取证应用的可行性.
- 准确的原材料表征对于精确的同位素建模至关重要.
- 现代质谱法可以解析材料中编码的众多同位素条形码.
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