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|Title:||Certification of the uranium hexafluoride reference materials for isotopic composition|
|Authors:||MIALLE SÉBASTIEN; RICHTER Stephan; HENNESSY Carmel; TRUYENS Jan; JAKOBSSON Ulf; AREGBE Yetunde|
|Citation:||JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY vol. online no. 305 p. 255-266|
|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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