The isotopic composition of natural uranium samples—Measurements using the new n( 233U)/ n( 236U) double spike IRMM-3636

The new double spike isotope reference material IRMM-3636 was prepared gravimetrically using highly enriched 233U and 236U isotopic material. The n( 233U)/ n( 236U) ratio was adjusted to about 1:1 and certified with an extended relative uncertainty of 0.016% (coverage factor k = 2). By mixing the n(...

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Bibliographic Details
Published in:International journal of mass spectrometry 2008, Vol.269 (1), p.145-148
Main Authors: Richter, S., Alonso-Munoz, A., Eykens, R., Jacobsson, U., Kuehn, H., Verbruggen, A., Aregbe, Y., Wellum, R., Keegan, E.
Format: Article
Language:English
Subjects:
Double spike
Isotope mass spectrometry
Isotope reference materials
Natural uranium
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Summary:The new double spike isotope reference material IRMM-3636 was prepared gravimetrically using highly enriched 233U and 236U isotopic material. The n( 233U)/ n( 236U) ratio was adjusted to about 1:1 and certified with an extended relative uncertainty of 0.016% (coverage factor k = 2). By mixing the n( 233U)/ n( 236U) double spike with a sample and applying internal mass fractionation correction, the n( 235U)/ n( 238U) ratio of a given sample can be determined with the highest possible precision and accuracy. Due to the low relative abundance of 234U for the IRMM-3636 double spike (
ISSN:1387-3806
1873-2798
DOI:10.1016/j.ijms.2007.09.012