1. 137Cs activity concentration in soil of Alagoas State, Brazil.
- Author
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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
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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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