title: [Particle size determination by radioisotope x-ray absorptiometry with sedimentation method].
abstract: The possibility of radioisotope X-ray absorptiometry to determine the particle size of powder in conjunction with sedimentation was investigated. The experimental accuracy was primarily determined by Cow and X-ray intensity. where Co'=weight concentration of the particle in the suspension w'=(micron/rho)l/(mu/rho)s-rhol/rhos rho; density micron/rho; mass absorption coefficient, suffix l and s indicate dispersion and particle, respectively. The radiosiotopes, Fe-55, Pu-238 and Cd-109 have high w-values over the wide range of the atomic number. However, a source of high micron value such as Fe-55 is not suitable because the optimal X-ray transmission length, Lopt is decided by the expression, micronlLopt approximately 2/(1+C'ow') by using Cd-109 AgKX-ray source, the weight size distribution of particles from the heavy elements such as PbO2 to light elements such as Al2O3 or flyash was determined.
mesh_terms: D000535:Aluminum / Q000032:analysis; D008722:Methods; D010316:Particle Size; D011868:Radioisotopes; D014965:X-Rays; D015034:Zinc Oxide / Q000032:analysis
chemical_list: D011868:Radioisotopes; D000535:Aluminum; D015034:Zinc Oxide