A simple method for the determination of uranium and thorium by delayed neutron counting |
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Authors: | R J Rosenberg |
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Institution: | (1) Reactor Laboratorio, Technical Research Centre of Finland, SF-02150 Espoo 15, (Finland) |
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Abstract: | A simple method for the determination of uranium and thorium by delayed neutron counting is described. One portion of the
sample is irradiated in a reactor and the delayed neutrons are counted. Another portion of the sample is mixed with B4 C powder absorbing the thermal neutrons, and irradiated in the same position. From those data, both uranium and thorium can
be calculated when a quantitative calibration has been made beforehand. The detection limits for the pure elements are 0.07
ppm for uranium and 2 ppm for thorium with the minimum analyzing time being 2 min. The accuracy of the method is investigated
by comparing results obtained by the method described here with results obtained by epithermal activation analysis. |
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