The saturated activities of Na-22, Mn-54, and Co-56 and the depth of sampling of soilsA multivariate linear regression study shows that the saturated activities of Na-22, Co-56, and Mn-54 are functions of the chemical composition and the reciprocal of the cube root of the sample weight. A procedure for taking the temporal variation in these short-lived radionuclides into account is described. The regression results are used to estimate the average depths of sampling of soil material. The data indicate that all 28 samples were in the same conditions of exposure when recovered as they had been for the last approximately 10 years. The saturation activity of Mn-54 is a very weak function of time.
Document ID
19780062800
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Keith, J. E. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Clark, R. S. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Bennett, L. J. (NASA Johnson Space Center Houston, Tex., United States)