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A new approach for the determination of elemental uranium in uranium bearing ore, using high resolution gamma-ray spectrometry, was applied. Using a variant of the enrichment meter technique, an agreement of better than 1% has been obtained between gamma-ray measurement results and a certified value obtained by other analytical methods. For the calibration of the gamma-ray spectrometer uranium reference samples have been used which are made available jointly in Europe and the USA as certified reference materials for gamma-ray spectrometry (EC NRM 171 and NBS SRM 969, respectively). The measured ore has been put in a specially designed container which ensured, in all directions seen from the radiation window, an uniform degree of infinite thickness of about 95 %. The measurement results can be taken as an example of the applicability of gamma-ray spectrometry when high accuracy is required and under conditions where homogeneous distributed elemental uranium is embedded in larger amounts of matrix material.

Additional information

Authors: BICKEL M, JRC Geel (BE);NAGEL W, JRC Geel (BE);QUIK F, JRC Geel (BE)
Bibliographic Reference: Article: Journal of Radioanalytical and Nuclear Chemistry (1995)
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