SAMOP 2023 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 8: Accelerator Mass Spectrometry III
MS 8.5: Vortrag
Freitag, 10. März 2023, 12:15–12:30, F128
Characterisation of Reactor Graphite with AMS Ion Beam Techniques — Martina Gwozdz1, Markus Schiffer1, •Stefan Heinze1, Klaus Eberhardt2, Gereon Hackenberg1, Susan Herb1, Timm- Florian Pabst1, Max Stefan1, Alexander Stolz1, Erik Strub3, Alfred Dewald1, and Dennis Mücher1 — 1Institut für Kernphysik, Universität zu Köln — 2Institut für Kernchemie, Johannes Gutenberg Universität, Mainz — 3Institut für Kernchemie, Universität zu Köln
Activated graphite, e.g. from graphite moderated reactors contains several radioactive isotopes like 14C, 36Cl, or 3H. For the final disposal of such material a quantitative characterization is demanded. We are aiming for a system which enables automated measurements using the AMS technique with gaseous samples for the above mentioned isotopes. The aimed system should provide a high sample throughput as well as the possibility of sample dilution in cases of high activity. At CologneAMS, a new gas-interface was built and tested for 14C measurements which uses a syringe for the transport of the sample gas into the ion source and a separate reservoir which can be used for high dilution. An advantage over the already established procedure using Liquid Scintillation Counting (LSC) is that the setup at the CologenAMS does not need elaborate chemical sample preparation and has a sensitivity down to 3· 10−9Bq/g. In this contribution we will present the layout of our systems as well as the stage of realisation. Supported by BMBF under contract number 15S9410B.