Production of no-carrier-added 135La at an 18 MeV cyclotron and its purification for investigations at a concentration range down to 10−15 mol/L

Alexander Mansel 1  and Karsten Franke 1
  • 1 Helmholtz-Zentrum Dresden-Rossendorf, Institute for Resource Ecology, Reactive Transport Division, Research Site Leipzig, Permoserstraße 15, 04318 Leipzig, Germany


The production of non-commercially available 135La by proton irradiation of an isotopically enriched [135Ba]BaCO3 target at a cyclotron is described. The purification of the radionuclide was performed by a La-selective resin. 135La was separated in no-carrier-added (n.c.a) form in a nitric acid solution with a radiochemical yield of 83 ± 5% and a total activity per batch of 43 ± 3 MBq. The enriched [135Ba]Ba was recycled to the carbonate form with a recovery of 90 ± 3%. On the basis of a detection limit of 1 Bq/mL, solutions of n.c.a. 135La could be measured down to the 1015 mol/L concentration range.

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Radiochimica Acta publishes original papers, review articles, and “rapid communications” (short articles of a more timely interest) on all chemical aspects of nuclear science and technology. The journal is geared toward scientists who are actively engaged in research work.