Retrospective determination of fallout radionuclides and 236 U/ 238 U, 233 U/ 236 U and 240 Pu/ 239 Pu atom ratios on air filters from Vienna and Salzburg, Austria

Cs and Pu (via Am) concentrations were measured γ-spectrometrically on air filters from the early 1960s (mainly from 1964-66) from Vienna, Austria, and an alpine station in Salzburg, Austria. Accelerator mass spectrometry (AMS) was used to determine Pu/ Pu, U/ U and U/ U atom ratios as well as U, Pu...

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Bibliographic Details
Published in:Journal of environmental radioactivity 2022-12, Vol.255, p.107030
Main Authors: Wallner, G, Uguz, H, Kern, M, Jirsa, F, Hain, K
Format: Article
Language:English
Subjects:
Air Filters
Austria
Plutonium - analysis
Radiation Monitoring - methods
Radioactive Fallout - analysis
Retrospective Studies
Uranium - analysis
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Summary:Cs and Pu (via Am) concentrations were measured γ-spectrometrically on air filters from the early 1960s (mainly from 1964-66) from Vienna, Austria, and an alpine station in Salzburg, Austria. Accelerator mass spectrometry (AMS) was used to determine Pu/ Pu, U/ U and U/ U atom ratios as well as U, Pu and Pu atom concentrations. The maximum U/ U atom ratio of these unique undisturbed global fallout samples was (1.19 ± 0.31) × 10 in spring 1964. The U/ U atom ratios were found within (0.15-0.49) × 10 and indicate that the weapons tests of the early 1960s can be excluded as U source. The U/ Pu atom ratios were calculated in the range of 0.22-0.48.
ISSN:1879-1700