SAMOP 2023 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 7: Poster
MS 7.11: Poster
Donnerstag, 9. März 2023, 16:30–19:00, Empore Lichthof
Spatially resolved trace analysis of radionuclides with laser ionization mass spectrometry — •Paul Hanemann1, Tobias Weissenborn1, Nina Kneip1, Laura Leifermann1, Darcy van Eerten1, Manuel Raiwa1, Felix Berg2, and Clemens Walther1 — 1Institute of Radioecology and Radiation Protection, Leibniz University Hannover — 2Institute of Nuclear Chemistry, University Mainz
Resonant laser secondary neutral mass spectrometry (rL-SNMS) combines the high spatial resolution of traditional time of flight secondary ion mass spectrometry (ToF-SIMS) with the advantage of element selectivity. Multiple grating-tuned Ti:Sa lasers allow access to a range of resonant ionization schemes. Combined with mass spectrometry, the method can detect actinides in single radioactive particles from the environment, down to 107 atoms of a single isotope [1]. In micrometer-sized particles from the Chornobyl exclusion zone, the relative 238Pu content can be determined by suppressing the dominant 238U in spent fuel. This is achieved quasi non-destructively without chemical preparation of the sample. The current capabilities of the rL-SNMS system are presented in this poster, with an outlook on further developments of the method and application to ultra-trace analysis.[1] DOI:10.1126/sciabv.abj1175