Abstracto
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Authors
Alexander D. Esquivel, Geraldo F. Kastner, Ângela M. Amaral, Roberto Pellacani G., Monteiro and Rubens M. Moreira
Abstract
Cosmogenic "7Be is a natural radiotracer produced in the stratosphere and troposphere and reached to the Earth surface via wet and dry fallout and hence its measurement for research of erosion in soils is very significant. The "7Be radio analyse based on gamma spectrometry technique has been a routine methodology for decades and although is the reference procedure is not free of analytical interference. "7Be is a β-γ emitting radionuclide (Eγ = 477.59 keV, T½ = 53.12d) and depending on the chemical profile of the soil its determination is susceptible to "2"2"8Ac (E_γ = 478.40 keV, T½ = 6.15h) interference. The aim of this work was to establish an analytical protocol for the "7Be determination in soil samples from Juatuba-Mg region in different sampling periods of dry and rainy seasons for erosion studies and to establish some methodologies for evaluating and correcting the interference level of "2"2"8Ac in the "7Be activity measurements by gamma spectrometry.