Determination of europium in minerals and rocks by neutron activation and gammagamma-coincidence spectrometry.
Neutron activation followed by gammagamma-coincidence measurements of 9-3 hr (152)Eu is shown to be a convenient method for routine determination of europium in minerals and rocks. In the concentration range 10-150 ppm the method is free of interference from other elements, and neutron shielding effects do not interfere seriously in the analysis. The precision of the method is about 5%.
Michelsen
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Institute for Atomergi Kjeller, Norway.
Steinnes
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