Abstract
The natural radioactivity, mainly due to radium ( 226Ra), in phosphate fertilizers used in north-western Greece has been measured by γ-spectroscopy. Also radioactivity measurements were performed in soil samples and were compared to samples from undisturbed soils. 226Ra belongs to the 238U chain and is the precursor of radon gas ( 222Rn). The radon concentrations in warehouses, where large quantities of fertilizers are kept, were measured with CR-39 SSNTDs. The radium concentrations in the fertilizers ranged from 0 to 4584 Bq kg −1 and the radon concentrations in warchouses were measured 540–3320 Bq m −3. The results are discussed from the radiation protection point of view.
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