title: A correction when measuring 222Rn daughter concentrations by alpha spectroscopy of filter samples.
mesh_terms: D000398:Air Pollution, Radioactive / Q000032:analysis*; D000512:Alpha Particles; D001729:Bismuth / Q000032:analysis*; D007854:Lead / Q000032:analysis*; D008851:Micropore Filters; D011059:Polonium / Q000032:analysis*; D011868:Radioisotopes / Q000032:analysis*; D013057:Spectrum Analysis
chemical_list: D011868:Radioisotopes; D007854:Lead; D011059:Polonium; D001729:Bismuth