Gamma Spectrometric Determination of Uranium-235 in Uranium Hexafluoride in 1S and 2S Cylinders

摘要

The abundance of uranium-235 in uranium hexafluoride contained in 1S and 2S sample cylinders is measured by using the characteristic 186-keV gamma rays of uranium-235 that pass through the cylinder walls. The gamma-count rate, corrected for cylinder-wall attenuation, is translated into uranium-235 isotopic abundance via an empirical calibration. The relative standard deviation, per 1000-sec count, is about 1% at 3 wt % uranium-235. (ERA citation 06:011302)