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Isolation and purification of protactinium-231.

S M Jerome1, S M Collins1, S Happel2

  • 1National Physical Laboratory, Teddington, Middlesex TW11 0LW, United Kingdom.

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
|August 22, 2017
PubMed
Summary

Researchers purified Protactinium-231 (Pa-231) for accurate dating in paleoclimate and nuclear forensics. A new resin, TK 400, achieved high recovery rates, ensuring reliable measurements for scientific studies.

Keywords:
Extraction chromatographyNuclear forensicsProtactiniumRadiochronometry

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Area of Science:

  • Radiochemistry
  • Nuclear Science
  • Analytical Chemistry

Background:

  • Protactinium-231 (Pa-231) is crucial for paleoclimate and nuclear forensics dating.
  • Accurate measurement of Pa-231 is essential for understanding decay chains, specifically the 227Ac chain.
  • Previous material sources for Pa-231 studies had poorly defined origins.

Purpose of the Study:

  • To present preparatory work for an upcoming CCRI(II) supplementary comparison of Protactinium-231.
  • To chemically purify a Pa-231 source material of unknown provenance.
  • To evaluate the efficacy of a new extraction chromatography resin, TK 400, for Pa-231 separation.

Main Methods:

  • Chemical purification of Protactinium-231 source material.
  • Testing of a new extraction chromatography resin (TK 400) for radionuclide separation.
  • Measurement of recovery yields for Pa-231 and its decay products.

Main Results:

  • Successful chemical purification of the Protactinium-231 material.
  • Achieved a recovery yield of approximately 85% for Protactinium-231.
  • Obtained good recovery yields (~95%) for decay products and removed stable element impurities.

Conclusions:

  • The preparatory work successfully purified Protactinium-231 material for comparison studies.
  • The TK 400 resin demonstrates effectiveness in separating Protactinium-231, with high recovery rates.
  • The purification process ensures reliable starting material for future nuclear forensics and paleoclimate research.