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PVC/Rn222 diffusionPosted by james barber on June 04, 2004 at 16:55:26: It appears that diffusion coefficients for polyvinylchloride PVC are different for various gases ? I need a diffusion coefficient for a heavier gas (Rn-222) ? I assume it will take a longer travel time through the material because to the size? In this case the travel time through the material will also affect the external flux rate as a function of the decay law .693/5500 min. T1/2 Rn-222 = 3.8 days Are there any known/established/accepted diffusion coefficients derived from studies of PVC and Rn-222 ?
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