Atmospheric Bismuth-212: Measurement and Some Geophysical Applications
- 1 March 1968
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 159 (3818) , 977-979
- https://doi.org/10.1126/science.159.3818.977
Abstract
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.Keywords
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