Detection of plutonium on air filters using the alpha-beta ratio of residual thoron daughter activity.
D000398:Air Pollution, Radioactive; D005374:Filtration; D011005:Plutonium; D011834:Radiation Monitoring; D011886:Radon; D013910:Thorium
D011005:Plutonium; D013910:Thorium; D011886:Radon