Tracing Nuclear Weapons Fallout Actinides and 99Tc by AMS

Aktivität: VorträgeVortragScience to Science

Beschreibung

Long-lived radionuclides emitted into the environment by nuclear weapons tests can be used to study their migration behaviour under different physio-chemical conditions. In order to allow a direct comparison, at VERA (Vienna Environmental Research Accelerator), we aim to analyse as many radionuclides as possible from the same sample. This requires a high overall detection efficiency including chemical sample preparation. The current procedure, which allows us to analyze 233,236U, 239,240Pu, 237Np and 241Am from the same 10 L ocean water sample, and depth profiles from the Pacific Ocean analysed accordingly will be discussed. In this context, experiments on the negative ion yield of Uranium from the ion source are being conducted from which the latest results will be presented. We recently started a project on the detection of nuclear weapons fallout 99Tc in different environmental reservoirs. A chemical purification procedure adjustable to the respective sample matrix is currently being developed using a 99mTc tracer. Preliminary results on the chemical recovery of different approaches and test measurements at the Maier-Leibnitz-Laboratory will be discussed.
Zeitraum11 März 2019
Ereignistitel83. Jahrestagung der DPG und DPG-Frühjahrstagung
VeranstaltungstypSonstiges
OrtRostock, DeutschlandAuf Karte anzeigen