title: Passive measurement of working levels and effective diffusion constants of radon daughters by the nuclear track technique.
abstract: Measurements were made of working level ratios and the effective diffusion constants of radon daughters using a special housing designed to provide a uniform diffusional environment at the passive detectors. For 2 of 7 exposures, the measured scale of the diffusion was too large to satisfy the uniformity requirement. For the other 5, it was satisfied and reasonable working level ratios (WLR) were obtained. Such a housing could be used for extended area working level measurements but is too bulky to be suitable for personnel dosimetry. Personnel dosimetry could be done in mines using a passive area measurement of WLR combined with individual passive 222Rn measurements.
mesh_terms: D001729:Bismuth / Q000032:analysis*; D004058:Diffusion; D007854:Lead / Q000032:analysis*; D011059:Polonium / Q000032:analysis*; D011874:Radiometry / Q000379:methods; D017687:Radon Daughters
chemical_list: D017687:Radon Daughters; D007854:Lead; D011059:Polonium; D001729:Bismuth