Repositório do Conhecimento Institucional do Centro Universitário FEI
 

Departamento de Física

URI permanente desta comunidadehttps://repositorio.fei.edu.br/handle/FEI/785

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20222

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Periódico: search.filters.ispartof.Journal of Physics: Conference SeriesAssunto: search.filters.subject.Gamma rays spectrometries

Resultados da Pesquisa

Agora exibindo 1 - 2 de 2
  • N/D
    Artigo de evento 0 Citação(ões) na Scopus
    Ingestion doses and elemental composition of herbal plants and fish
    (2022-11-09) PIEDADE, F. G.; NASCIMENTO, N. B.; SCIANI, W.; CURADO, J. F.; Marcilei Aparecida Guazzelli
    © 2022 Institute of Physics Publishing. All rights reserved.It is known that the determination of ingestion doses of radioactive elements is a complex problem due to the different metabolic behaviours of the human beings. To contribute to this topic, this work presents the analysis of the ingestion doses of 40K, 232Th and 238U in some species of herbal plants and fish. These analyses were done using technique of gamma ray spectrometry and applying the estimation models for ingestion dose of ICRP and IAEA. Furthermore, in this article was applied the analytic technique of Energy Dispersive X-ray fluorescence (EDXRF) in the analysis of elementary composition and concentrations of components in those same species of herbal plants and fish.
  • N/D
    Artigo de evento 1 Citação(ões) na Scopus
    Ingestion dose and elemental composition in coffee by x-ray fluorescence and gamma-ray spectrometry
    (2022-11-09) Marcilei Aparecida Guazzelli; CURADO. J. F.; LOUREIRO, K. P.; MEDINA, N. H.; RIZZUTTO, M. A.
    © 2022 Institute of Physics Publishing. All rights reserved.The study proposed in this paper aims to analyze macro and micronutrients in coffee powder samples from Brazil, Venezuela and Colombia, in two different stages of coffee preparation: before and after coffee filtering. In the analyzed samples, presence of K, Rb, Ca, Cl, S, Sr and Fe elements in coffee powder and coffee grounds using Energy Dispersive X-ray fluorescence (ED-XRF) was quantified. The presence of 40K and the radionuclides from the uranium and thorium series decays were verified using gamma-ray spectrometry analyses. With the results obtained using these two techniques, it was possible to estimate the ingestion index for natural radioisotopes. The results show that the annual dose due to coffee ingestion reaches 1.96(4) mSv, depending on the origin of the coffee and considering the annual coffee consumption in Brazil. Elemental Composition analysis of coffee grounds indicates that it can be reused as a product with a high concentration of nutrients.