The penneabilhy and diffusion coeffident ofa material (Uiylon-453, thidoicss 3.26mm) to ^Rn ha been measured using two different techniques. The first technique made use of radioactivity (^Rn) measurements under steady-state Ci.e., radioactive equilibrium) conditions, whercas the second technique required continuous radioactivity monitoring, Le., radioactivity versus time measurements. The experimental apparatus consisted oftwin chiunbers separated by the material of interest Radioactivity measurements were conducted using two identical counting systems. The penneabflity (k) of the material was measured to be 3.44X10-10 (cin^/s) and the diffusion coeffident (p) was found to be ^xlO-^cnAs). OS/30/8308:330705848978811RLELK’a""’
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