Title: Certification of the uranium hexafluoride reference materials for isotopic composition
Citation: JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY vol. online no. 305 p. 255-266
Publisher: SPRINGER
Publication Year: 2014
JRC N°: JRC91539
ISSN: 0236-5731
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC91539
DOI: 10.1007/s10967-014-3843-1
Type: Articles in periodicals and books
Abstract: The IRMM-019 to IRMM-029 series of uranium hexafluoride materials is certified for the isotopic composition. After conversion into uranyl nitrate solution, certification and homogeneity measurements were performed by Thermal Ionization Mass Spectrometry. Analyses were performed by Modified Total Evaporation and for some materials the major isotope amount ratio n(235U)/n(238U) was measured using a n(233U)/n(236U) double spike. Measurements were confirmed by UF6 Gas Source Mass Spectrometry. Major isotope amount ratios were certified with relative expanded uncertainties (k=2) from 0.015 % to 0.030 %, minor isotope amount ratios n(234U)/n(238U) and n(236U)/n(238U) with relative expanded uncertainties ranging from 0.02 % to 3 %.
JRC Directorate:Health, Consumers and Reference Materials

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