Analytical Method for THE DETERMINATION OF BETA-ACTIVITY (transmitted through a total absorber thickness 5 mg Al/sq cm) IN PLANT SOLUTIONS CONTAINING PLUTONIUM

摘要

A measured portion of the sample is evaporated to dryness on a stainless steel counting tray. The β-activity of the residue is measured using standard G. M. equipment with a thin end-window counting tube;the equipment is calibrated against standard strontium-90/yttrium-90 sources in equilibrium, prepared from solutions of known strontium-90 content. A correction is made to account for the amount of plutonium present and the corrected activity is expressed as d.p.m. strontium-90/ yttrium-90.