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Radiochimica Acta

International Journal for chemical aspects of nuclear science and technology

Editor-in-Chief: Qaim, Syed M.

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Volume 104, Issue 8


Recovery of Ra-223 from natural thorium irradiated by protons

Aleksandr N. Vasiliev
  • Corresponding author
  • Lomonosov Moscow State University, Moscow, Russia
  • Institute for Nuclear Research of Russian Academy of Sciences, Moscow-Troitsk, Russia
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  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Valentina S. Ostapenko
  • Lomonosov Moscow State University, Moscow, Russia
  • Institute for Nuclear Research of Russian Academy of Sciences, Moscow-Troitsk, Russia
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Elena V. Lapshina / Stanislav V. Ermolaev / Sergey S. Danilov / Boris L. Zhuikov / Stepan N. Kalmykov
  • Lomonosov Moscow State University, Moscow, Russia
  • Institute for Nuclear Research of Russian Academy of Sciences, Moscow-Troitsk, Russia
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2016-04-07 | DOI: https://doi.org/10.1515/ract-2015-2549


Irradiation of natural thorium with medium-energy protons is considered to be a prospective approach to large-scale production of 225Ac and 223Ra. In addition to the earlier-developed method of 225Ac isolation, the present work focuses on the simultaneous recovery of.223Ra from the same thorium target. Radiochemical procedure is based on liquid-liquid extraction, cation exchange and extraction chromatography. The procedure provides separation of radium from spallation and fission products generated in the thorium target. High chemical yield (85– 90%) and radionuclide purity of 223Ra (> 99.8% except 224Raand 225Ra isotopes) have been achieved.

Keywords:: Thorium metal; proton iradiation; radium isotopes; ion exchange; extraction chromatography


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About the article

Received: 2015-11-23

Accepted: 2016-02-22

Published Online: 2016-04-07

Published in Print: 2016-08-01

Citation Information: Radiochimica Acta, Volume 104, Issue 8, Pages 539–547, ISSN (Online) 2193-3405, ISSN (Print) 0033-8230, DOI: https://doi.org/10.1515/ract-2015-2549.

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