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  • 1 Comenius University Department of Nuclear Chemistry 80100 Bratislava (Czechoslovakia)
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The specific phenomena accompanying the daughter nuclide formation by radioactive β-decay of complex parent compounds cause certain deviations from a thermodynamic distribution of daughter elements in separation procedures (e.g. in radionuclidic generators) and they are shown to complicate or, less probably, simplify their separation. A simple kinetic model has been proposed to explain such processes as the distribution of some daughter nuclides of fission products by solvent extraction with chelating compounds (systems of99Mo−99mTc and144Ce−144Pr with oxines).