Mainz 2026 – scientific programme
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MS: Fachverband Massenspektrometrie
MS 5: Poster
MS 5.2: Poster
Wednesday, March 4, 2026, 17:00–19:00, Philo 1. OG
AMS measurements of 93Mo for nuclear fusion research — •Kyra Altindag1, Esad Hrnjic1, Carlos Vivo-Vilches1, Silke Merchel1, Martin Martschini1, Lee W. Packer2, Johannes H. Sterba3, Matic Dokl4, Jixin Qiao4, Erik Strub5, and Karin Hain1 — 1University of Vienna, Faculty of Physics, Vienna, Austria — 2UKAEA, Culham Campus, Abingdon, United Kingdom — 3Center for Labelling and Isotope Production, TRIGA Center Atominstitut, TU Wien, Vienna, Austria — 4Department of Environmental and Resource Engineering, Technical University of Denmark, Roskilde, Denmark — 5Division of Nuclear Chemistry, University of Cologne, Cologne, Germany
In fusion environments, 93Mo (T1/2 = 4839 a) will be produced via nuclear reactions of neutrons from the deuterium-tritium fusion with Mo-containing materials, e.g. stainless steel. At the Vienna Environmental Research Accelerator (VERA), accelerator mass spectrometry (AMS) is under development for 93Mo. The selection of MoO2− allows the suppression of the respective stable isobar 93Nb via laser photodetachment within the Ion-Laser InterAction Mass Spectrometry (ILIAMS) setup using a 637 nm laser. A Mo foil was irradiated at the TRIGA Mark II reactor at TU Wien to yield 93Mo/natMo ratios of 10−9, and further diluted with stable natMo to produce MoO2 with ratios down to 10−12. First AMS measurements showed a blank level of 93Mo/natMo = (1-5)×10−13. The 93Mo/natMo ratio expected in foil samples of future fusion reactor component materials irradiated during the DTE2 deuterium-tritium campaign at the JET reactor is ≈ 10−10.
Keywords: Accelerator mass spectrometry; Molybdenum-93; Nuclear fusion