Uranium and thorium determination in Brazilian coals by epithermal neutron activation analysis |
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| Authors: | L F Bellido B de C Arezzo |
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| Institution: | (1) Instituto de Engenharia Nuclear, Comissão Nacional de Energia Nuclear, C. P. 2186, 20001 Rio de Janeiro, (Brasil);(2) Present address: Comissão Nacional de Energia Nuclear, Rua General Severiano 90, 22294 Rio de Janeiro, Brasil |
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| Abstract: | An experimental technique has been developed to determine impurities in coal. Uranium was determined by counting the239Np 106.1 keV  -ray with a LEPS detector and thorium by counting the233Pa 311.8 keV -ray with a Ge(Li) detector. Seventeen coal samples were analyzed with an average precision of 3% and a quantitative determination limit of 0.153  g/g for uranium and 0.078 g/g for thorium. The technique allows determinations of up to twenty elements besides U and Th and can be applied in routine analysis. |
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