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Advanced system for separation of rare-earth fission products

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Abstract

A microprocessor-controlled radiochemical separation system, which has been developed at the INEL, has been further advanced to separate individual rare-earth elements from mixed fission products in times of a few minutes. The system was composed of an automated chemistry system fed by two ∼300μg252Cf sources coupled directly by a He-jet to transport the fission products. Chemical separations were performed using two high performance liquid chromatography columns coupled in series. The first column separated the rare-earth group by extraction chromatography using dihexyldiethylcarbamoylmethylphosphonate (DHDECMP) adsorbed on Vydac C8 resin. The second column isolated the individual rare-earth elements by cation exchange chromatography using Aminex A-9 resin with α-hydroxyisobutyric acid (α-HIBA) as the eluent. Significant results, which have been obtained to date with this advanced system, are the identification of several new neutron-rich rare-earth isotopes including155Pm (T=48±4 s) and163Gd (T=68±3 s). In addition a half-life of 41±4 s is reported for160Eu.

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Authors and Affiliations

  1. Idaho National Engineering Laboratory, EG&G Idaho, Inc., 83415, Idaho Falls, Idaho, (USA)

    J. D. Baker, R. J. Gehrke, R. C. Greenwood & D. H. Meikrantz

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  1. J. D. Baker
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  2. R. J. Gehrke
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  3. R. C. Greenwood
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  4. D. H. Meikrantz
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Work supported by the U.S. Department of Energy under DOE Contract No. De-ACO7-76IDO-1570.

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Baker, J.D., Gehrke, R.J., Greenwood, R.C. et al. Advanced system for separation of rare-earth fission products. J. Radioanal. Chem. 74, 117–124 (1982). https://doi.org/10.1007/BF02520365

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  • DOI: https://doi.org/10.1007/BF02520365

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