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- W2083804408 abstract "In a previous paper (G. N. Kotel'nikov and N. I. Kalyakin, Atomnaya Energiya 8, 370(1960) No. 4), the shielding of gamma -radiation by forests was incorrectly estimated and the conclusion was reached that aerial prospecting is not feasible under such conditions. This problem was further investigated by calculating the absorbing ability of pine trees which cover about 80% of the USSR forested areas. The calculations took into account the effect of the undergrowth and the foliage and derived mass absorption coefficients for the complex primary gamma -ray spectrum and the Compton scatterinp of the U family of elements. Experimental tests were also carried out, comparing the intensity of the radiation of 2 similar areas by an aerial survey: one of the areas consisted of a pine forest, the other of a field near the edge of the woods. Co/sup 60/ point sources were used for imitating the natural radiation; the flight was undertaken at 50-m height for safety reasons. The experimental data agreed well with the calculations and showed that be previous authors overestimated the shielding ability of the trees by factors ranging from 3 to 5. (TTT)" @default.
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- W2083804408 date "1962-03-01" @default.
- W2083804408 modified "2023-09-27" @default.
- W2083804408 title "Aerial prospecting in wooded areas" @default.
- W2083804408 doi "https://doi.org/10.1016/0368-3230(62)90127-1" @default.
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