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2. 137Cs activity concentration in soil of Alagoas State, Brazil.

Author

de Andrade Filgueiras, Rogério, Dutra Garcêz, Ricardo Washington, Barbosa da Silva, Leandro, Lopes, José Marques, Araujo Ribeiro, Fernando Carlos, Viglio, Eduardo Paim, and Xavier da Silva, Ademir

Subjects
*GERMANIUM detectors, *SOILS, *SOIL sampling, *CESIUM, *GEOLOGICAL surveys
Abstract

Cesium 137 is present in worldwide. To evaluate its deposition in the Brazilian state of Alagoas a total of 41 samples were collected by the Geological Survey of Brazil, then processed and analyzed by gamma-ray spectrometry with hyperpure germanium detectors. The activity concentration varied from (0.3 ± 0.1) Bq/kg to (1.1 ± 0.4) Bq/kg. The present study shows that the Borborema Plateau acts as a natural barrier to rainfall, favoring the deposition of 137Cs on the local soil. • Soil samples were collected in the first 25 cm from the surface. • Cs-137 activity concentrations ranged from 0.3 to 1.1 Bq/kg, with an geometric mean of 0.53 Bq/kg. • Most samples containing 137Cs were found in the rainiest region of the state. [ABSTRACT FROM AUTHOR]

Published
2021
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