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MS: Fachverband Massenspektrometrie
MS 9: Actinide Analysis
MS 9.3: Vortrag
Donnerstag, 13. März 2025, 18:15–18:30, HS 2 Chemie
Nuclear Forensic Analysis of a single Chornobyl Hot Particl via Advanced Mass Spectrometry Techniques — •Laura Leifermann1, Greg Balco2, Autumn Roberts2, Paul Hanemann1, Tobias Weissenborn1, Wolfgang Schulz1, Manuel Raiwa2, Martina Klinkenberg3, Felix Brandt3, Michael Savina2, Brett Isselhardt2, and Clemens Walther1 — 1Leibniz University Hannover, Hannover, Germany — 2LLNL, Livermore, USA — 3Forschungszentrum Jülich, Jülich, Germany
In the field of nuclear forensics, clarifying the origin and age of an unknown sample is the central question and common practice. Nuclear fuel samples rise to a number of new questions regarding burn-up, degree of enrichment, and operational conditions during the service life. The resonant-laser-SNMS method is ideally suited for this purpose. Actinides, fission and breeding products can be analyzed isotope and element selective. If this is combined with noble-gas-MS, many insights can be gained about a fuel sample. This provides a complete picture of the age, burn-up, neutron flux densities during reactor operation and source of a sample. The ratio of U-235/U-238 of a special particle from Chornobyl is 1,22% which indicates a relative low burn-up and matches the Xe-136(131+132) isotope ratios. This is in contrast to the Xe-134(131+132) ratio which indicates a high Pu-fission. This work addresses a unique particle that has raised questions that can be solved by a synthesis of different mass spectrometric analysis techniques.
Keywords: Hot Particles; Chornobyl; Noble-Gas-MS; SNMS