The effect of gamma irradiation on benzene solutions of benzyldibutylamine with cetyl alcohol used for the extraction of europium
and americium from nitrate solutions was investigated. The dependence of the distribution coefficient on the dose absorbed
either by the whole system or some efficient component was measured. Nitric acid present during irradiation significantly
lowers the radiation stability, while benzyldibutylamine and cetyl alcohol appear to be radiostable components. Up to tens
of kGy's—the doses expected in an extraction process from highly active solutions—the system seems to be quite stable.