Atmospheric bismuth-212: measurement and some geophysical applications.
The concentrations of lead-212 and its short-lived daughter bismuth-212 in air near the ground were determined simultaneously by adaptation of the immersed-filter, delayed-coincidence technique of Assaf and Gat to measurement of the 3 x 10-(7)-second bismuth-212 and polonium-212 pair. The radioactive disequilibrium between lead-212 and bismuth-212 depends strongly on the efficiency of the ground in acting as a sink for these nuclides. This efficiency is low under dry conditions.
D000398:Air Pollution, Radioactive; D001729:Bismuth / Q000032:analysis*; D003359:Cosmic Radiation; D007854:Lead / Q000032:analysis*; D011874:Radiometry
D007854:Lead; D001729:Bismuth