A combined TIMS and ICP-MS study for Th0.5Np0.5O2 thorium neptunium mixed oxide analysis

Nd, Am and Cm isotopic measurements after simultaneous separation in transmutation irradiated samples

“…All the measurements were performed with the TE method. This method, divided in 3 steps, was previously described for Th, U or Am and was applied to Nd, Am and Cm 8,27,28 . The filaments heating process can slightly differ depending on the element to analyze.…”

Atomic spectrometry update: review of advances in the analysis of metals, chemicals and materials

“…A combination of TIMS and ICP-MS was used for assessing a new synthesised (Th-Np)O 2 mixed oxide powder. 186 Using ID-TIMS and a total evaporation method, the expanded uncertainty for the Th mass fraction was <1%, with the main contribution coming from the spike mass fraction uncertainty. The expected uncertainty for Np was 1.8% and was measured using ICP-MS because of the lack of spike solutions for ID-TIMS.…”

An isotope dilution mass spectrometry overview: tips and applications for the measurement of radionuclides

“…z-score ¼ y lab À y PT s PT (35) The zeta-score compares the same numerator to the uncertainty of the difference between the laboratory measurement value (u lab ) and assigned value (u PT , eqn (36) The z-score indicates the number of PT standard deviations between the laboratory measurement value and the PT assigned value. The zeta-score determines whether the measurement uncertainty value claimed by the laboratory allows the laboratory's measurement value and the assigned value to be considered identical.…”

“…23 Furthermore, the International Atomic Energy Agency (IAEA) considers ID-MS as one of the most accurate methods in terms of the International Target Values (ITVs) for measurement uncertainties applied on safeguarding nuclear materials. 24,25 TIMS and ICP-MS are the techniques of choice to measure the isotope ratio of most elements, 26 for example radionuclides such as Sr, 27 Cs, [28][29][30] Nd, [31][32][33][34] Th, 35,36 U, 33,[37][38][39][40][41] Pu, 3,33,38,40,[42][43][44][45] Am 7,31,38 and Cm. 31,46 ID-MS is a versatile tool for radionuclide quantity measurement and the "gold standard" for nuclear safeguards.…”