August 30, 2021 to September 3, 2021
University of Innsbruck
Europe/Zurich timezone

【338】Determination of 135Cs and 137Cs by Accelerator Mass Spectrometry

Sep 1, 2021, 6:45 PM
Room B

Room B

Talk Nuclear, Particle- and Astrophysics (FAKT - TASK) Nuclear, Particle- & Astrophysics


Alexander Wieser (University of Vienna)


The radionuclides 135Cs and 137Cs are present in the environment with an isotopic ratio 135,137Cs/Cs ranging below 10-10. The isotopic ratio 135Cs/137Cs can be used for source assessment of anthropogenic cesium input into the environment and finds applications in geology, nuclear forensics and oceanography. The combination of low concentration, low beta-decay energy and long half-life prevents the determination of 135Cs via radiometric methods with the demanded sensitivity. Therefore, we established a measurement procedure for cesium by Accelerator Mass Spectrometry at VERA. First results on isobar suppression, abundance sensitivity and 135Cs/137Cs ratios of environmental samples will be presented.

Primary author

Alexander Wieser (University of Vienna)


Johannes Lachner (University of Vienna) Martin Martschini (Universität Wien) Alfred Priller Peter Steier (University of Vienna, Faculty of Physics - Isotope Physics) Mr Dorian Zok (Gottfried Wilhelm Leibniz Universität Hannover - Institut für Radioökologie und Strahlenschutz ) Robin Golser (University of Vienna, Faculty of Physics - Isotope Physics)

Presentation materials