DPG-Frühjahrstagung, 09.03.2023, Hannover, Deutschland
سنة النشر:
2023
الوصف:
The new multi-purpose 1-MV AMS facility HAMSTER (Helmholtz Accelerator Mass Spectrometer for Tracing Environmental Radionuclides) is built within the HZDR research campus in Dresden- Rossendorf starting in 2022. The new machine is especially dedicated to the analysis of ultra-trace levels of actinides in environmental samples. Therefore, eventual contamination of the site where the new accelerator building is being constructed should be avoided and clarified. Hence, several soil samples close to the construction site of the new accelerator building have been analyzed to assess the content and isotopic ratios of the actinides U, Np and Pu. The samples have been processed in the existing chemistry labs of HZDR’s 6-MV DREAMS facility showing low background levels. Overall, the samples show expected signatures of global fallout in Pu concentrations and APu/239Pu ratios. However, in some samples increased 236U concentrations and relatively low 233U/236U atomic ratios have been detected pointing to an additional source of 236U. Additional analysis is currently ongoing.
