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Determination of uranium concentrations and activity ratios in silicates by alpha spectrometry: application to the volcanic rocks from the Trindade and Martin Vaz Islands (Brazil)

dos Santos, R.N ; Marques, L.S ; Ribeiro, F.B

Applied radiation and isotopes, 2002-05, Vol.56 (5), p.741-750 [Periódico revisado por pares]

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Título:
Determination of uranium concentrations and activity ratios in silicates by alpha spectrometry: application to the volcanic rocks from the Trindade and Martin Vaz Islands (Brazil)
Autor: dos Santos, R.N ; Marques, L.S ; Ribeiro, F.B
Assuntos: 234U /238U activity ratio ; Brazilian geological standards ; Electrodeposition ; Ion exchange chromatography ; Trindade Island ; Uranium
É parte de: Applied radiation and isotopes, 2002-05, Vol.56 (5), p.741-750
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: A detailed radiochemical procedure for alpha spectrometry measurements of uranium concentrations and of 234U/ 238U activity ratios in silicates is presented. The described chemical processing is characterized by relatively high uranium yields, in the range of 51–89%. The application of this chemical procedure to geological standards allowed estimating a reproducibility of the alpha spectrometry uranium measurements on the order of 3.5%. As an application example, the procedure was used in the analysis of quaternary volcanic rocks from the Trindade and Martin Vaz Islands, Brazil.
Editor: England: Elsevier Ltd
Idioma: Inglês

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