Penetration of Fallout Fission Products into an Indiana Soil

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Abstract
Although most of the radioactive fallout reaching the earth stays in the leaf layer and the top inch of soil, some is carried further into the soil and can be detected to a depth of several inches. This report describes a gammaray spectrometric study of fallout activity as a function of depth of soil. Total gamma activity deposited from recent tests was found to be over 1.5 curies per square mile at a site in eastern Indiana during July, 1962.