The transfer phenomena of I4ICe, 6oCo, I3'Cs, 54Mn, *jSr and s5Zn in the Rhone sediments were studied in our laboratory. The transfer of the various radioelements in the environment concerned obeys Fick's second law of diffusion. The diffusion coefficients (D) ofa5Sr and 54Mn were determined. They are respectively 2.
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