Abstract
In the healing gallery of Badgastein (Austria) aerosol samples were collected with cascade impactor devices and Pb-210 and Pb-212 activity concentrations were measured by liquid scintillation counting. Simultaneously Rn-222 was determined with a Si surface barrier detector. At different ventilation rates of the gallery, Pb-210 concentrations ranged between 4.6 and 730 mBq m(-3), while Pb-212 values were between 760 and 7230 mBq m(-3). The highest Pb-212/Pb-210 ratio of 165 was found during full ventilation, when Rn-222 and Pb-210 levels dropped considerably. The lowest ratio of 10 was measured after a few months of patients' treatment, when very high Rn-222 levels of up to 350 kBq m(-3) and the maximum Pb-210 level were reached. Taking into account the particle sizes of the aerosols, we observed that the Pb-212 activity distribution was shifted towards smaller particle sizes compared to the Pb-210 distribution.
| Original language | English |
|---|---|
| Title of host publication | Radioactivity in the Environment |
| Subtitle of host publication | The Natural Radiation Environment VII: VIIth Int. Symp. On the NRE |
| Volume | 7 |
| Publication status | Published - Dec 2005 |
Austrian Fields of Science 2012
- 104020 Radiochemistry
- 503013 Subject didactics of natural sciences