STUDY ON RADON EMANATION FROM SELECTED BUILDING MATERIALS IN Iraqi Kurdistan Region

The air concentrations of radon (Rn-222) emitted to the atmosphere from 7 types of construction materials (sand, gravel, cement, block, gypsum, gypsum board and ceramic tile) used Iraqi Kurdistan, were measured and analyzed using continuous radon monitoring equipment model 1029. Each sample was placed for 84 hours inside 0.118 m 3 sealed container. Of the seven samples examined, the sand showed the highest levels of radon emission 235.45±4.21Bq.m -3 , whereas the ceramic tile showed the lowest level 75.38±5.16 Bq.m -3 . The average radon exhalation rate from the sand and ceramic tile showed approximately the same value, which was higher than that of the ceramic floors by more than 19%.