STUDY OF NATURAL RADIONUCLIDES AND RADON EMANATION IN BRICKS USED IN THE ATTICA REGION, GREECE

Bricks commonly used in the Attica region, Greece have been studied fo r both natural radionuclide content and radon emanation. The high-reso lution gamma-ray spectroscopy technique, as well as radon exhalation m easurements, have been employed. For determination of radon exhalation rate, besides the trivial method which consists of a single measureme nt of radon concentration in a closed vessel containing the sample, a shorter duration continuous accumulation/counting method has been esta blished. The results of radon exhalation measurements have been establ ished. The results of radon exhalation measurements have been used tog ether with the gamma-spectrometry determination of Ra-226 in order to determine radon emanation coefficients.