EXPERIMENTAL-STUDY OF RADON AND THORON DIFFUSION THROUGH BARRIERS

The radon chamber and radon calibration set have been modified for inv estigation of the diffusion coefficients of the barriers for reduction of radon exposure in the dwellings and for application as filters to separate radon and thoron. The volume radon activities have been measu red by continuous monitors with scintillation cell or ionisation chamb er, The theory on which the experimental determination of a barrier di ffusion coefficient is based, is presented. The diffusion ability of r adon has been studied for different materials and the results of the m easurements are presented and discussed.