Research on Uranium Enrichment Determination Using 88-100 keV Region of HPGe Uranium Spectrum

The method which is used to determine uranium enrichment by deconvoluting complex peak clusters in 88-100 keV region of γ/X spectrum of uranium materials is the key technique of some uranium enrichment determination software, such as MGAU, MGA ++, etc. According to the basic principle of this method, a code to analyze the spectrum was written, in which peak shape model of γ/X ray was built to fit the spectrum and efficiency fitting factor was developed to make efficiency correction. Two types of uranium samples with enrichment ranging from 1.80% to 90.1% were measured by a HPGe detector and analyzed by the code. For the samples measured, the uranium enrichment was determined with relative deviation of about 2% for pellet and 1% for powder samples.