Abstract
For the analysis of particle size distribution of UO2, ZrOa and other substances, a y-ray counting method was applied to estimate the accumulative percentage of the particles at the bottom of sedimentation column. The sample materials were irradiated in J.R.R.-1 reactor and labelled with the radioactive isotopes formed by (n γ) reaction. The particle size distributions of UO2 and ZrO2 in the range of 0.05μ to 60μ were determined. The principles and the advantageous points of this method and the applications are also described.
