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Modelling Natural Radioactivity in Sand Beaches of Guarapari, Espírito Santo State, Brazil
Departamento de Engenharia Nuclear, Escola de Engenharia Universidade Federal de Minas Gerais, Belo Horizonte, Brasil
Departamento de Engenharia Nuclear, Escola de Engenharia Universidade Federal de Minas Gerais, Belo Horizonte, Brasil
Departamento de Engenharia Nuclear, Escola de Engenharia Universidade Federal de Minas Gerais, Belo Horizonte, Brasil
Departamento de Engenharia Nuclear, Escola de Engenharia Universidade Federal de Minas Gerais, Belo Horizonte, Brasil
Departamento de Engenharia Nuclear, Escola de Engenharia Universidade Federal de Minas Gerais, Belo Horizonte, Brasil
Centro de Desenvolvimento da Tecnologia Nuclear/Comiss?o Nacional de Energia Nuclear (CDTN/CNEN), Laboratório de Trítio, Belo Horizonte, Brasil
- 1 Departamento de Engenharia Nuclear, Escola de Engenharia Universidade Federal de Minas Gerais, Belo Horizonte, Brasil
- 2 Departamento de Engenharia Nuclear, Escola de Engenharia Universidade Federal de Minas Gerais, Belo Horizonte, Brasil
- 3 Departamento de Engenharia Nuclear, Escola de Engenharia Universidade Federal de Minas Gerais, Belo Horizonte, Brasil
- 4 Departamento de Engenharia Nuclear, Escola de Engenharia Universidade Federal de Minas Gerais, Belo Horizonte, Brasil
- 5 Departamento de Engenharia Nuclear, Escola de Engenharia Universidade Federal de Minas Gerais, Belo Horizonte, Brasil
- 6 Centro de Desenvolvimento da Tecnologia Nuclear/Comiss?o Nacional de Energia Nuclear (CDTN/CNEN), Laboratório de Trítio, Belo Horizonte, Brasil
World Journal of Nuclear Science and Technology·Volume 03 (2013)·Pages 65–71·Published 30 April 2013·DOI10.4236/wjnst.2013.32011
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Abstract
Using gamma-ray spectrometry, the activity concentration of naturally occurring radionuclides 226 Ra, 212 Pb, 214 Pb, 232 Th, and 40 K was determined in sand beaches samples from different areas in Guarapari, Espírito Santo state, from Brazil. The absorbed dose rates and annual effective dose were calculated and the results were compared with the internationally accepted values as well as others high background radiation areas (HBRAs). The activity concentration of the 232 Th in Areia Preta as well as the absorbed dose rates and annual effective dose were higher than the others regions compared. The results show that Areia Preta in Guarapari has higher background found in beaches in world. This work is part of a research project for the natural background determination of the Brazilian coast.
KeywordsGamma-Ray SpectrometryBeach SandGuarapari
- F. S. Erees, S. Akozcan, Y. Parlak and S. Cam, “Assessment of Dose Rates around Manisa (Turkey),” Radiation Measurements, Vol. 41, No. 5, 2006, pp. 598-601. doi:10.1016/j.radmeas.2005.11.004
- R. Veiga, N. Sanches, R. M. Anjos, K. Macario, J. Bastos, M. Iguatemy, J. G. Aguiar, A. M. A. Santos, B. Mosquera, C. Carvalho, M. Baptista Filho and N. K. Umisedo, “Measurement of Natural Radioactivity in Brazilian Beach Sands,” Radiation Measurements, Vol. 41, No. 2, 2006, pp. 189-196. doi:10.1016/j.radmeas.2005.05.001
- United Nations Scientific Committee on the Effects of Atomic Radiation, “Sources and Effects of Ionizing Radiation,” Report to General Assembly, with Scientific Annexes, United Nations, New York, 2000.
- M. Ghiassi-nejad, S. M. J. Mortazavi, J. R. Cameron, A. Niroomand-rad and P. A. Karam, “Very High Background Radiation Areas of Ramsar, Iran: Preliminary Biological Studies,” Health Physics, Vol. 82, No. 1, 2002, pp. 87-93. doi:10.1097/00004032-200201000-00011
- A. K. Mohanty, D. Sengupta, S. K. Das, V. Vijayan and S. K. Saha, “Natural Radioactivity in the Newly Discovered High Background Radiation Area on the Eastern Coast of Orissa, India,” Radiation Measurements, Vol. 38, No. 2, 2004, pp. 153-165. doi:10.1016/j.radmeas.2003.08.003
- D. C. Vasconcelos, C. Pereira, A. H. Oliveira, T. O. Santos, Z. Rocha and M. A. B. C. Menezes, “Determination of Natural Radioactivity in Beach sand in the Extreme South of Bahia, Brazil, Using Gamma Spectrometry,” Radiation Protection and Environment, Vol. 34, No. 3, 2012, pp. 178-184.
- A. Malarica, C. N. Luce, R. Sogni, L. Achilli and S. Fabbri, “Naturally Occurring Radionuclides in the Monazite Sands of Guarapari and Meaipe (Brazil),” Proceedings of the La Radioattività Ambientale nel Nuovo assetto Istituzionale Piancenza, Bologna and Ravenna, 3 November 1994, pp. 225-230.
- N. Fujinami, T. Koga and H. Morishima, “External Exposure from Terrestrial Radiation at Guarapari and Meaipe in Brazil,” Proceedings of the 10th International Congress of the International Radiation Protection Association, Hiroshima, 14-19 May 2000, pp. 1-19.
- A. C. Freitas and A. S. Alencar, “Gamma Dose Rates and Distribution of Natural Radionuclides in Sand Beaches— Ilha Grande, Southeastern Brazil,” Journal of Environmental Radioactivity, Vol. 75, No. 2, 2004, pp. 211-223. doi:10.1016/j.jenvrad.2004.01.002
- G. F. Knoll, “Radiation Detection and Measurement,” 4th Edition, John Wiley & Sons Ltd., New York, 1989.