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Natural and artificial radionuclides in soils from Paraná State, Brazil

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Abstract

Soil samples from Paraná State, Brazil, were collected in 1991 and compared with others collected at the same location in March 1977 and at the end of 1983. Pedological analyses were practiced on these samples and137Cs and232Th,226Ra and40K activities were determined by gammaray spectrometry. A latitude dependence of137Cs was found as well. It was impossible to determine the137Cs contribution from Chernobyl nuclear accident because of low fallout and intense leaching, erosion and re-suspension in soils of regions with high annual precipitation. Natural radionuclides did not show such effects.

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Author notes

  1. L. A. Schuch

    Present address: UFSM, Departamento de Física/Nucleo de Estudos e Pesquisas Aeroespacias, Campus Universitário, 97119-900, Santa Maria, RS, Brazil

Authors and Affiliations

  1. Divisão de Geofísica Espacial, Instituto Nacional de Pesquisas Espaciais (INPE), Caixa Postal 515, 12201-970, São José dos Campos, SP, Brazil

    D. J. R. Nordemann

  2. Serviço Nacional de Levantamento e Conservação de Solos, Empresa Brasilieira de Pesquisa Agropecuária (EMBRAPA), Caixa Postal 34121, 22470-051, Rio de Janeiro, RJ, Brazil

    W. O. Barreto & A. Cardoso

  3. Departmento de Solos, Universidade Federal de Santa Maria (UFSM), Campus Universitário, 97119-900, Santa Maria, RS, Brazil

    A. Zago

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Schuch, L.A., Nordemann, D.J.R., Barreto, W.O. et al. Natural and artificial radionuclides in soils from Paraná State, Brazil. Journal of Radioanalytical and Nuclear Chemistry, Articles 177, 39–49 (1994). https://doi.org/10.1007/BF02132409

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