Determination of rare earths in silicate rocks by epithermal neutron activation and a simple group separation |
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| Authors: | A O Brunfelt E Steinnes |
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| Institution: | 1. Mineralogical-Geological Museum, University of Oslo, Norway
2. Isotope Laboratories, Institutt for Atomenergi, Kjeller, Norway
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| Abstract: | The determination of nine rare earth elements in rock samples by epithermal neutron activation, followed by a simple group-separation procedure and Ge(Li) γ-ray spectrometry, is described. This method is found to be advantageous for the determination of Nd, Gd, Ho, Er and Lu by means of the short-lived nuclides149Nd,159Gd,166Ho,171Er and176m Lu. Precision for La, Sm and Eu is similar to that of thermal neutron activation, that for Dy is worse. Samples of the standard rocks, basalt BCR-1 and granite G-2, were analyzed by this procedure and the results obtained are compared with previously reported data. |
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