Measurement of radon exhalation rate in various building materials used in Morocco

Measurements of radon surface and mass exhalation rates were made for 35 types of building material samples frequently used in Morocco. In this survey, we used the Can technique, containing CR-39 detectors, to estimate the radon exposure from building materials. The surface and mass exhalation rates ranged from 37.92 mBq−2 h−1, 3.05 mBq kg−1 h−1 to 1545.60 mB q m−2 h−1, 43.14 mBq kg−1 h−1, with an average of 271.4192 mBq m−2 h−1 and 10.23 mBq kg−1 h−1, respectively. All the values of effective radium content and effective dose were calculated and they were within the safe limit in all samples studied.