Methods of producing radionuclides for spectrometric gamma-ray sources and their standardization--2. Europium-152.

The radionuclide 152Eu was produced by irradiating 151Eu2O3 or 151EuCl3 enriched to 98.9% with thermal neutrons. 152Eu was separated from rare-earth impurities by extraction chromatography on a column using 0.