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zadetkov: 62
1.
  • A combined TEVA-DGA chromat... A combined TEVA-DGA chromatography chemistry for purifying Pu, Am, and Np from U materials
    Engel, John R.; Buettner, Jacob E.; Denton, Joanna S. ... Journal of radioanalytical and nuclear chemistry, 08/2023, Letnik: 332, Številka: 8
    Journal Article
    Recenzirano

    We present a combined TEVA-DGA chromatography chemistry to purify single-element fractions of Pu, Am, and Np from bulk (mg-level) U materials. Plutonium and Np are first sorbed onto TEVA resin using ...
Celotno besedilo
2.
  • A chromatography chemistry ... A chromatography chemistry for purifying Pa from U-Nb metal alloys
    Engel, John R.; Denton, Joanna S.; Lamont, Stephen P. ... Journal of radioanalytical and nuclear chemistry, 02/2023, Letnik: 332, Številka: 2
    Journal Article
    Recenzirano

    We present a chromatography chemistry for purifying protactinium from uranium metal alloys containing weight-percent concentrations of niobium. Niobium is precipitated in 9 M HCl without the ...
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3.
  • Results from a controlled d... Results from a controlled depleted uranium metal casting experiment designed to investigate nuclear Forensic Radiochronometry Signatures
    Kayzar-Boggs, Theresa M.; Luitjohan, Kara E.; Imhoff, Seth D. ... Journal of radioanalytical and nuclear chemistry, 06/2023, Letnik: 332, Številka: 6
    Journal Article
    Recenzirano
    Odprti dostop

    The accurate interpretation of uranium metal 230 Th/ 234 U and 231 Pa/ 235 U radiochronometry model ages requires an understanding of how uranium parent nuclides and decay progeny ( 230 Th and 231 ...
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4.
  • Separation of protactinium ... Separation of protactinium from uranium-niobium alloys for 231Pa–235U radiochronometry in nuclear forensic investigations
    Chen, Christine Yifeng; Higginson, Matthew A.; Kayzar-Boggs, Theresa M. ... Journal of radioanalytical and nuclear chemistry, 05/2023, Letnik: 332, Številka: 7
    Journal Article
    Recenzirano
    Odprti dostop

    The isolation and purification of protactinium from uranium materials is essential for 231 Pa– 235 U radiochronometry, but separating Pa from uranium-niobium alloys, a common material in the nuclear ...
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5.
  • Establishing discordance as... Establishing discordance as a radiochronometric signature for nuclear forensic investigations: a multi-laboratory intercomparison exercise
    Higginson, Matthew A.; Kayzar-Boggs, Theresa M.; Chen, Christine Y. ... Journal of radioanalytical and nuclear chemistry, 12/2022, Letnik: 331, Številka: 12
    Journal Article
    Recenzirano

    The radiochronometric model age is an important signature in nuclear forensic analysis. Recent studies have illustrated the need for controlled experiments on the behavior of decay products during ...
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6.
  • Certification of Uranium Is... Certification of Uranium Isotope Amount Ratios in a Suite of Uranium Ore Concentrate Certified Reference Materials
    Zhang, Ruoxi; Nadeau, Kenny; Gautier, Eduardo Amilcar ... Geostandards and geoanalytical research, March 2022, 2022-03-00, 20220301, Letnik: 46, Številka: 1
    Journal Article
    Recenzirano
    Odprti dostop

    In this study, data from thirteen laboratories from around the world are presented for a successful certification of uranium isotope ratios in uranium ore concentrate (UOC) certified reference ...
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7.
  • Improved methods to age-dat... Improved methods to age-date uranium certified reference materials for nuclear forensics using the 231Pa/235U radiochronometer
    Denton, Joanna S.; Wende, Allison M.; Kayzar-Boggs, Theresa M. ... Journal of radioanalytical and nuclear chemistry, 2022/12, Letnik: 331, Številka: 12
    Journal Article
    Recenzirano

    Improved methods employed at Los Alamos National Laboratory for 231 Pa/ 235 U radiochronometry are outlined. We present elution curves obtained during 233 Pa tracer preparation from 237 Np. ...
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8.
  • International interlaborato... International interlaboratory compilation of trace element concentrations in the CUP-2 uranium ore concentrate standard
    Denton, Joanna S.; Bostick, Debra A.; Boulyga, Sergei F. ... Journal of radioanalytical and nuclear chemistry, 07/2023, Letnik: 332, Številka: 7
    Journal Article
    Recenzirano
    Odprti dostop

    A nuclear forensics investigation involving a uranium ore concentrate relies on accurate and precise analysis of impurities. Analytical data defensibility requires the use of reference materials as ...
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9.
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10.
  • An interlaboratory collabor... An interlaboratory collaboration to determine consensus 231Pa/235U model ages of a uranium certified reference material for nuclear forensics
    Kayzar-Boggs, Theresa M.; Treinen, Kerri C.; Okubo, Ayako ... Journal of radioanalytical and nuclear chemistry, 2020/3, Letnik: 323, Številka: 3
    Journal Article
    Recenzirano

    Application of the 231 Pa/ 235 U radiochronometer for nuclear forensic investigations is challenged by a lack of certified reference materials with 231 Pa/ 235 U model purification dates. The Japan ...
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zadetkov: 62

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