Chemical separation procedure for the nuclide analysis of a tantalum target irradiated for 500 days with 800 MeV protons

  • G. Küppers


A rapid radiochemical separation procedure has been developed for the determination of long-lived and stable nuclides produced by spallation and activation in a tantalum target irradiated for 500 days with 800 MeV protons. In this procedure the matrix element tantalum and simultaneously the182Ta activity, built-up by activation of the matrix with themalized spallation neutrons is removed from many elements. About 50 mg of the sample is dissolved in a mixture of concentrated nitric and hydrofluoric acid. After dilution tantalum is extracted with a solution of 0.2M tetrahexylammonium bromide in methyl isobutyl ketone (MIBK). The residual amount of tantalum and the remaining182Ta activity are 0.0003% and the recoveries of 27 investigated elements are in the range of 96.0–99.9%. A further 22 elements are quantitatively separated according to their chemical behavior. In the final aqueous fraction the separated long-lived and stable nuclides of 49 elements can be measured with high sensitivity by γ-ray spectrometry and mass spectrometry (ICP-MS).


Tantalum Isobutyl Hydrofluoric Acid Separation Procedure Radiochemical Separation 
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Copyright information

© Akadémiai Kiadó 1997

Authors and Affiliations

  • G. Küppers
    • 1
  1. 1.Central Department of Analytical Chemistry (ZCH)Research Center Jülich (KFA)JülichGermany

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