Springer Online Journal Archives 1860-2000
Energy, Environment Protection, Nuclear Power Engineering
Abstract The results are given of a radiochemical investigation, carried out in 1954, of the rare earth elements formed by the fission of uranium, thorium, and bismuth nuclei by 680 Mev protons, The main attention was devoted to methods of isolation and separation of these elements. In a search for the optimum conditions of separation by ion exchange chromatography, the effect of the nature of the complex former (ammonium acetate, nitrate, oxalate, and lactate), the pH of the eluant, and the concentration of the rare earth elements on the degree of separation was studied. A technique was evolved whereby it was possible to isolate the radioisotopes of almost all the rare earth elements and to determine the yields of some of them. In addition, the formation of a new samarium isotope with a half-life of about 20 days is presumed.
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