RADIOCHEMICAL SEPARATION OF GROUP 5 ELEMENTS. MODEL EXPERIMENTS FOR INVESTIGATION OF DUBNIUM CHEMICAL BEHAVIOUR

  • E Tereshatov E
  • G A Bozhikov
  • V Aksenov N
  • Ya Starodub G
  • K Vostokin G
  • V Shishkin S
  • Dmitriev S.N
Publication date
March 2020

Abstract

Chemical behaviour of group 5 elements in the aqueous hydrofluoric acid solutions was studied. The radiochemical method for the cation exchange separation of Nb (Pa) and Ta from Zr, Hf and lanthanides is presented. The opportunity for ion exchange separation of Zr and Hf is shown. The developed scheme allows excluding of the presence of SF heavy actinides in fractions of separated elements. On the basis of the data of the present work, it is possible to suggest the following order of the stability of the fluoride complexes of group 4 and 5 elements: Nb (Ра) > Zr > Hf > Ta. The order of the complex formation is in agreement with theoretical predictions. This analytical procedure can be used in future heavy nuclei synthesis experimen...

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