Abstract
Indoor radon ( 222Rn) concentrations were measured in Paarl homes by means of electret ion chambers. The concentrations varied between 28 and 465 Bq m −3. The average values (Bq m −3) found in houses on the west and east side of the Berg River, which bisects Paarl, were 132 (±11) and 37 (±3), respectively. Radiometric analyses of soils show that the mean 226Ra activity concentration is three times higher on the west than on the east side of the Berg River.
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