Quantitative Determination of Zirconium Hydride in a Zirconium Oxide Matrix by Neutron Vibrational Spectroscopy

Glagolenko, Irina; Carney, Kevin; Kern, S.; Goremychkin, E. A.

doi:10.1366/000370202760171644

Cited by 2 publications

(1 citation statement)

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“…These three materials offer different insights into the spectrometer’s performance. ZrH 2 has a simple, reproducible, and well-known behavior (a full assignment in terms of fundamental modes, overtones, and combinations is available), , while C 4 H 2 I 2 S is the calibrant of choice for TOSCA because its spectrum contains narrow and well-defined peaks . LDPE can be obtained as sheets of precise and uniform thickness, and this allowed INS measurements without the cell contribution to the signal.…”

Section: Methodsmentioning

confidence: 99%

Hydrogen Detection Limits and Instrument Sensitivity of High-Resolution Broadband Neutron Spectrometers

et al. 2022

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The limits of detection (LOD) and quantitation (LOQ) in the mass domain, for broadband vibrational spectroscopy with neutrons on the TOSCA spectrometer at the ISIS Pulsed Neutron and Muon Source (UK), have been studied. The well-known 3σ and 10σ approaches are used through a specifically developed analytical procedure that is based on the calculation of the integrated spectral intensities in selected energy-transfer ranges, as a function of mass of standard reference materials and calibrants, such as ZrH 2 , 2,5diiodothiophene, and low-density polyethylene. The analysis shows that the blank, that is, the instrument setup without the analyte, plays a critical role in the measurement performance, especially for small specimen quantities. The results point that TOSCA enables detection of 128 μmol (LOD H ) and quantitation of 428 μmol (LOQ H ) of elemental hydrogen analytes in ZrH 2 . The determined values for this and other standards allow for the assessment of the calibration curve design and instrument sensitivity and define a method to be used for inelastic neutron scattering spectrometers such as TOSCA, or VESPA, the new beamline under construction at the European Spallation Source in Lund (Sweden).

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Section: Methodsmentioning

confidence: 99%