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- Author or Editor: A. Brunfelt x
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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.
Abstract
Three procedures are outlined for the determination of rare-earth elements in geological materials. The irradiation of the samples is carried out by either thermal or epithermal neutrons. Two of the methods, one of which is especially suitable for ultramafic rocks are based on radiochemical separations, while in the third method non-destructive analysis is applied to apatites. The γ-ray activity measurements are performed by means of coaxial Ge(Li)-detectors.
