Refinement of Pu parent¨Cdaughter isotopic and concentration analysis for forensic (dating) purposes
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- 作者：Khalil J. Spencer ; Lav Tandon ; Dave Gallimore ; Ning Xu ; Kevin Kuhn ; Laurie Walker and Lisa Townsend
- 关键词：Plutonium ; Age ; dating ; Forensic chemistry
- 刊名：Journal of Radioanalytical and Nuclear Chemistry
- 出版年：2009
- 出版时间：November, 2009
- 年：2009
- 卷：282
- 期：2
- 页码：549-554
- 全文大小：252.1 KB
文摘
Plutonium (Pu) metal samples from an interlaboratory exchange exercise and simulated swipe samples were dated using plutonium–uranium (Pu–U) and plutonium–americium (Pu–Am). Metal data were evaluated for consistency and the swipe data against its source material. Metal ages based on 239Pu versus 235U and 240Pu versus 236U agreed to within a few percent, while the 238Pu–234U and 241Pu–241Am measurements had larger uncertainties. Swipe ages compared favorably with the material’s known history. Neptunium (237Np) analyses were examined in the context of the 241Pu–241Am–237Np system to estimate whether Np can provide insights on material from which Am, Np, and U were removed.