| Autor: |
Bragança MJ; Laboratório Nacional de Metrologia das Radiações Ionizantes, Instituto de Radioproteção e Dosimetria, CNEN, Av. Salvador Allende, s/n -- Recreio, Rio de Janeiro CEP 22780-160, Brazil., Tauhata L, Clain AF, Moreira I |
| Jazyk: |
angličtina |
| Zdroj: |
Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine [Appl Radiat Isot] 2004 Aug-Sep; Vol. 61 (2-3), pp. 351-5. |
| DOI: |
10.1016/j.apradiso.2004.03.007 |
| Abstrakt: |
Phosphated rocks from three ores located in the Middle-West region of Brazil can be used as low-level radioactive reference material due to the fact that they contain significant concentrations of thorium and, in some cases, of uranium. This paper describes the procedure to characterise those samples using several analytical methods. Statistical analysis and correlations studies have shown several geochemical similarities and the results obtained suggest the possibility to produce a reference material composed of a mixture of two similar ores. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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