Study of the diffusion of trace elements and radionuclides in soils. Capillary modification of the thin layer method. Diffusion of 137Cs

Thin layer method of measuring diffusion processes was modified to shorten time and to increase efficiency of experiments. For this purpose small and fine glass capillaries of 20 mm length and inner diameter of several millimeters were used as diffusion cells. The diffusion of trace amounts of 137Cs, its dependence on soil moisture and interaction with the soil have been studied. Experimental technique, evaluation of records and the basic interpretation of the migration process are described. (author) 19 refs.; 5 figs.; 4 tabs