Column separation of tetravalent cerium fission products from trivalent rare earth radio-isotopes

Dembowski, Mateusz; Margiotta, Cheriece; Smythe, Nathan C.; Flanagan, Dylan Cole; Meininger, Daniel; James, Michael R.; Hudston, Lisa Ann; Boswell, Melissa; Lance, Camilla A.; Rendon, Randy Joseph; Goff, George Scott; May, Iain

doi:10.1007/s10967-022-08277-2

Title: Column separation of tetravalent cerium fission products from trivalent rare earth radio-isotopes

Journal Article · Sun Apr 10 00:00:00 EDT 2022 · Journal of Radioanalytical and Nuclear Chemistry

DOI:https://doi.org/10.1007/s10967-022-08277-2· OSTI ID:1893677

^[1];

^[1]; Flanagan, Dylan Cole ^[1];

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^[1]; Lance, Camilla A. ^[1]; Rendon, Randy Joseph ^[1];

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^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Rapid and efficient isolation of individual rare earth element (REE) radioisotopes from complex mixtures is necessary to support the fields of nuclear forensics, medical isotope production and nuclear physics measurements. The separations must be robust and generate sufficiently high purity samples for subsequent radiological analysis. Current methodologies utilize a laborious two step Ce(IV)-iodate precipitation followed by Ce(IV)-nitrate di-(2-ethylhexyl)phosphoric acid/n-heptane extraction. This work reports an alternative method to isolate Ce fission product isotopes equilibrated with milligrams of cold carrier, from the remaining REE’s using a Ce(IV)/LN-resin (Eichrom Technologies) based separation. Optimization of Ce(IV) loading, REE(III) elution volume and subsequent Ce(III) stripping step utilized ^166mHo tracer. Mixed fission product experiments provided a further test of this LN-resin method, with analysis of purified ^141/144Ce, ¹⁴⁷Nd and ⁹¹Y. Overall, while decontamination factors were lower for the LN-resin method, (vs. the combined precipitation/extraction) the simplicity of the technique and the satisfactory fission product analysis results point to the efficacy of this method.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); US Air Force Technical Applications Center

Grant/Contract Number:: 89233218CNA000001

OSTI ID:: 1893677

Report Number(s):: LA-UR-22-20281; TRN: US2310216

Journal Information:: Journal of Radioanalytical and Nuclear Chemistry, Vol. 331, Issue 5; ISSN 0236-5731

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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