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KMID : 0371819690010010033
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Nuclear Engineering and Technology
1969 Volume.1 No. 1 p.33 ~ p.38
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A RAPID DETERMINATION OF U^(235) CONTENTS OF URANIUM SAMPLES UTILIZING HIGH RESOLUTION Ge(Li) DETECTOR
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Abstract
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Determinations of the isotopic contents of U235 and U238 in ten uranium samples containing 0.72 - 89.70 at % U235 were carried out in two ways utilizing high resolution Ge (Li) gamma-ray spectrometer. One method is based upon the fact that the intensity of 185.5 kev gamma-ray vary linearly with U235 content for a gives geometry. Another method applied for the direct determination of the U235/U238 isotopic ratios is the precision gamma-ray spectrometric analysis of reactor irradiated uranium samples after allowing a fixed cooling time for one hour. The results obtained by both methods well agree with the values calculated from the isotopic contents of highly enriched original uranium samples measured by mass spectrometer. The precision obtained was well below 5% for most of the isotopic ratios investigated.
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