title: A convenient counter for measuring alpha activity of smear and air samples.
mesh_terms: D000398:Air Pollution, Radioactive / Q000032:analysis*; D000512:Alpha Particles; D006371:Helium; D011005:Plutonium; D011834:Radiation Monitoring / Q000295:instrumentation*; D011886:Radon; D012666:Semiconductors
chemical_list: D006371:Helium; D011005:Plutonium; D011886:Radon