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MS: Fachverband Massenspektrometrie
MS 7: Poster
MS 7.9: Poster
Mittwoch, 8. März 2017, 17:00–19:00, P OG1
Excitation scheme development for resonant Laser-SNMS on Strontium — •Hauke Bosco1, Michael Franzmann1,2, Tobias Kron2, Dominik Studer2, Martin Weiß1, Klaus Wendt2, and Clemens Walther1 — 1Institut für Radioökologie und Strahlenschutz Universität Hannover — 2Institut für Physik Universität Mainz
Radionuclides were released into the environment in large amounts by nuclear weapons testing and by accidents in nuclear facilities. One of the most radiotoxic nuclides is Strontium 90, which is efficiently produced by fission of Uranium 235. Therefore, rapid detection techniques for trace and ultra-trace amounts of Strontium 90 are mandatory to be able to provide counter-measures for possible releases from nuclear facilities. Since radiometric methods with good detection limits (e.g. LSC) are time consuming, a rapid mass spectrometric ultra-trace analysis of environmental samples is developed based on an existing system for spatially resolved SIMS combined with a laser system for isobaric suppression by resonance ionization of elements. To find ionization steps with a high ion production yield, resonance ionization spectroscopy (RIS) on Strontium is performed starting from known electron transitions. Developed excitation schemes are applied to Strontium for resonance ionization to perform resonant Laser-SNMS. Different schemes are tested on artificial as well as natural samples containing stable and radioactive Strontium.