Highly selective two-step laser ionization schemes for the analysis of actinide mixtures


Resonance ionization mass spectroscopy has proven to be a very efficient and selective method for the spatially resolved ultratrace determination of actinide contaminations, and the analysis of specific element and isotopic distributions on surfaces and environment particles. We report on the identification of highly element-selective optical excitation schemes identified for this purpose, with a particular focus on the precise determination of the isobaric ratios of 235U to 239Pu as well as 243Am to 241Pu. The chosen two-step ionization schemes were characterized with respect to their element selectivity on synthetic multi-element actinide mixtures, with an element ratio Pu : Am : U of 1 : 10 : 104, a composition which is typical, e.g., for spent nuclear reactor fuels.


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Open Access funding provided by Projekt DEAL. Support by the Bundesministerium für Bildung und Forschung (BMBF, Germany) under project number 05P15UMCIA is acknowledged.

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Correspondence to Nina Kneip.

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This article is part of the Topical Collection on Proceedings of PLATAN 2019, 1st International Conference, Merger of the Poznan Meeting on Lasers and Trapping Devices in Atomic Nuclei Research and the International Conference on Laser Probing, Mainz, Germany 19-24 May 2019

Edited by Krassimira Marinova, Michael Block, Klaus D.A. Wendt and Magdalena Kowalska

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Kneip, N., Düllmann, C.E., Gadelshin, V. et al. Highly selective two-step laser ionization schemes for the analysis of actinide mixtures. Hyperfine Interact 241, 45 (2020). https://doi.org/10.1007/s10751-020-01712-4

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  • Laser spectroscopy
  • Mass spectrometry
  • Actinides
  • Isotope ratio
  • Multi-element mixture