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Meisenberg, O. ; Tschiersch, J.

Test of methods for retrospective activity size distribution determination from filter samples.

Radiat. Meas. 76, 29-35 (2015)

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Open Access Green as soon as Postprint is submitted to ZB.

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Determining the activity size distribution of radioactive aerosol particles requires sophisticated and heavy equipment, which makes measurements at large number of sites difficult and expensive. Therefore three methods for a retrospective determination of size distributions from aerosol filter samples in the laboratory were tested for their applicability. Extraction into a carrier liquid with subsequent nebulisation showed size distributions with a slight but correctable bias towards larger diameters compared with the original size distribution. Yields in the order of magnitude of 1% could be achieved. Sonication-assisted extraction into a carrier liquid caused a coagulation mode to appear in the size distribution. Sonication-assisted extraction into the air did not show acceptable results due to small yields. The method of extraction into a carrier liquid without sonication was applied to aerosol samples from Chernobyl in order to calculate inhalation dose coefficients for 137Cs based on the individual size distribution. The effective dose coefficient is about half of that calculated with a default reference size distribution.

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Publication type Article: Journal article

Document type Scientific Article

Corresponding Author

Keywords Activity Size Distribution ; Chernobyl Shelter ; Human Respiratory Tract Model ; Inhalation Dose Coefficient ; Retrospective Determination; Liquid-chromatography; Resuspended Aerosol; Chernobyl Area; Ultrasound; Extraction; Particles

ISSN (print) / ISBN 1350-4487

e-ISSN 1879-0925

Journal Radiation Measurements

Quellenangaben Volume: 76, Pages: 29-35

Publisher Elsevier

Publishing Place Oxford

Non-patent literature Publications

Reviewing status Peer reviewed

Institute(s) Institute of Radiation Protection (ISS)