Experimental methods for investigation of radioactive gas diffusion in solids

A new means to determine parameters of radioactive gas diffusion in solids based on the simultaneous use of gas permeability and autoradiography methods is suggested. The technique is designed for the study of topological peculiarities of the diffusion process and for the determination of the spectrum of the diffusion local coefficients. The design of the installation is developed, the corresponding mathematical model is suggested, and technique of the experiment conducting is tested. Using the autoradiographic variant of permeability method the diffusion coefficients of the radioactive inert gas-radon-in polypropylene are determined. A good accordance of the results obtained with the data of traditional methods of investigation is found