137Cs activity concentration in soil of Alagoas State, Brazil. (April 2021)

• Record Type: Journal Article
• Authors: de Andrade Filgueiras, Rogério; Dutra Garcêz, Ricardo Washington; Barbosa da Silva, Leandro; Lopes, José Marques; Araujo Ribeiro, Fernando Carlos; Viglio, Eduardo Paim; Xavier da Silva, Ademir
• Is Part Of: Applied radiation and isotopes. Volume 170(2021)
• Publication Date: 2021-04
• Subjects: 137Cs -- Activity concentration -- Soil -- HPGe; Radiology -- Periodicals; Radiation -- Industrial applications -- Periodicals; Nuclear chemistry -- Periodicals; Internet resource; Periodical; 660.298
• DOI: 10.1016/j.apradiso.2021.109607
• Languages: English
• ISSNs: 0969-8043

Abstract

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 137 Cs on the local soil. Highlights: 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 137 Cs were found in the rainiest region of the state.