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<p>A benchtop laser ablation laser ionization time-of-flight mass spectrometer was used to analyze natural uranium dioxide pellets doped with isotopically enhanced taggants (α or β) molybdenum, nickel, or tungsten at 1000 or 100&#xa0;μg&#xa0;g<sup>−1</sup>. In the 1000&#xa0;μg&#xa0;g<sup>−1</sup> doped pellets, the taggants were observed and the α and β mixtures were identified. Taggants were typically not detected at 100&#xa0;μg&#xa0;g<sup>−1</sup>. Ion peaks for uranium and uranium oxides were observed for <sup>235</sup>U and <sup>238</sup>U isotopes, with a <sup>235</sup>U enrichment range estimated at 0.74–1.4%. Zirconium and yttrium were observed as process signatures and attributed to milling media used in pellet preparation.</p>

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Analysis of tagged uranium oxide pellets with laser ablation laser ionization TOF-mass spectrometry

  • 期刊论文

  • 发表日期：

    2025年10月10日

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  • Karla A. Erickson,
  • Michael Schappert,
  • Samuel R. Lee,
  • Ning Xu,
  • Kevin Boland,
  • Rebecca Chamberlin

摘要

A benchtop laser ablation laser ionization time-of-flight mass spectrometer was used to analyze natural uranium dioxide pellets doped with isotopically enhanced taggants (α or β) molybdenum, nickel, or tungsten at 1000 or 100 μg g−1. In the 1000 μg g−1 doped pellets, the taggants were observed and the α and β mixtures were identified. Taggants were typically not detected at 100 μg g−1. Ion peaks for uranium and uranium oxides were observed for 235U and 238U isotopes, with a 235U enrichment range estimated at 0.74–1.4%. Zirconium and yttrium were observed as process signatures and attributed to milling media used in pellet preparation.