Method for the Purification and Estimation of Milligram Amounts of Thorium-229 from Bulk Uranium-233.

摘要

The preliminary separation is carried out by adsorbing Th(sup +4) charged species on cation exchanger. The final purification is done by adsorbing thorium from 7M nitric acid medium on anion exchanger and eluting it out with PH-2 nitric acid. (sup 229)Th and (sup 228)Th are estimated by direct gamma-ray counting of the daughter products and also by following the growth of the alpha activity, due to the growth of the daughter products in the purified thorium fraction. (author). 4 figs., 9 refs. (Atomindex citation 20:007610)