title: Theory of passive measurement of radon daughters and working levels by the nuclear track technique.
abstract: A theoretical basis is described for long-term measurement of the activities of the alpha emitters in air by the track-etching technique. Inference of the other activities allows working levels to be derived. A set of absorber foils allows the differing response to alpha particles of different energies to be used to identify the relative abundance of the alpha emitters and the importance of diffusion to surfaces. The method is appropriate to measuring long-term exposures to radon atmospheres in homes or mines.
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D000396:Air Pollutants, Radioactive / Q000032:analysis*; D001729:Bismuth / Q000032:analysis*; D006798:Housing; D007854:Lead / Q000032:analysis*; D008906:Mining; D011059:Polonium / Q000032:analysis*; D011834:Radiation Monitoring / Q000295:instrumentation*; D011874:Radiometry / Q000295:instrumentation; D017687:Radon Daughters
chemical_list: D000393:Air Pollutants; D000396:Air Pollutants, Radioactive; D017687:Radon Daughters; D007854:Lead; D011059:Polonium; D001729:Bismuth