Determination of porosity of different materials by radon diffusion

Clements, 1974, Atmospheric pressure effects on 222Rn transport across the earth-air interface, J. Geological Res., 79, 5025 Davis, 1969, Porosity and permeability of natural materials Davis, S.N., Dewiest, R.J.M., 1966. Hydrology. Wiley, New York, p. 160. Graton, 1935, Systematic packing of spheres with particular relation to porosity, and permeability and experimental study of the porosity and permeability of elastic sediments, J. Geology, 43, 785, 10.1086/624386 Kirkham, D., Powers, W.L. 1972. Advanced Soil Physics, Interscience, New York, p. 434. Linsley, R.K., Franzini, J.B. 1964. Water-resources Engineering, McGraw-Hill Book Company, New York, p. 75. Linsley, R.K., Kahler, M.A., Paulhus, J.L.H., 1958. Hydrology for Engineers. McGraw-Hill Book company, New York, p. 130. Mujahid, 1988, Diffusion of Radon Through a Column of Sand, Turkish J. Nuclear Sci., 25, 13 Tsang, Y.W., Narasimhan, T.N., 1992. Effects of periodic atmospheric pressure variation on radon entry into buildings. J. Geophys. Res. 97, 9161. Welty, 1969 Wilkening, 1974, Radon 222 from the Island of Hawaii: Deep soils are more important than lava or volcanoes, Science, 183, 413, 10.1126/science.183.4123.413