Abstract
UNDER the above title Warburton, Fookes and Watt1 have described some measurements performed in June 1959 in Australia with a scintillation detector at altitudes up to 3.6 km. The day-to-day variations found by the authors “were surprisingly large and were found to occur mainly in the atmosphere between the ground and temperature inversion layers”. They concluded that it was probably mainly radon and its decay products which were detected and attributed their γ-counting to the γ-rays from lead-214 and bismuth-214, estimating that a record of 8 c/s corresponds to 10−17 c./cm3 of radon of a uniform concentration.
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References
Warburton, J. A., Fookes, R. A., and Watt, J. S., Nature, 207, 181 (1965).
Wigand, A., and Wenk, F., Ann. d. Phys. (4), 86, 657 (1928).
In Compendium of Meteorology, edit. by Malone, T. F., 155 (Boston, 1951).
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BĚHOUNEK, F. Airborne Observations of Natural Radioactivity. Nature 209, 1342–1343 (1966). https://doi.org/10.1038/2091342b0
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DOI: https://doi.org/10.1038/2091342b0
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