High natural radiation in Brazilian sands

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dc.contributor.authorSilveira M.A.G.
dc.contributor.authorMedina N.H.
dc.contributor.authorPereira B.R.
dc.contributor.authorAguiar V.A.P.
dc.date.accessioned2019-08-19T23:47:18Z
dc.date.available2019-08-19T23:47:18Z
dc.date.issued2012
dc.description.abstractThe present work investigated Brazilian beach sands in order to analyze the total external natural radiation dose using a gamma-ray spectrometry technique. The activities from the radionuclides 40K and the elements from the series of 238U and 232Th were measured. The sand samples from Morro Branco beach, Ceará, and Itacaré beach, Bahia, presented different colors and grain size than the beaches from São Paulo. A sample collected in Itacaré beach showed an effective dose of 2.5 (1) mSv/yr. This value is outside the annual typical range (0.3-0.6 mSv) indicated by the United Nations Scientific Committee on the Effects of Atomic Radiation. The high effective dose found in Itacaré beach is mainly due to the presence of a large amount of 232Th and 238U. All the other samples collected in Ceará and São Paulo States are inside the annual typical range. Energy-Dispersive X-Ray Spectroscopy (EDS) microanalysis showed that this high external radiation is related to the presence of zircon and monazite, which commonly carry traces of uranium and thorium. © 2012 American Institute of Physics.
dc.description.firstpage379
dc.description.lastpage382
dc.description.volume1423
dc.identifier.citationM. A. G. SILVEIRA; MEDINA, N. H.; Pereira, B. R.; V. A. P. Aguiar. High natural radiation in Brazilian sands. AIP Conference Proceedings, v. 1423, p. 379/1551-7616-382, 2012.
dc.identifier.doi10.1063/1.3688830
dc.identifier.issn1551-7616
dc.identifier.urihttps://repositorio.fei.edu.br/handle/FEI/1449
dc.relation.ispartofAIP Conference Proceedings
dc.rightsAcesso Restrito
dc.subject.otherlanguageNatural Radioactivity
dc.subject.otherlanguageRadiation Dose
dc.titleHigh natural radiation in Brazilian sands
dc.typeArtigo de evento
fei.scopus.citations4
fei.scopus.eid2-s2.0-84858247562
fei.scopus.updated2024-03-04
fei.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84858247562&origin=inward
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