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On the accuracy of Total-IBA

Jeynes, Christopher, Palitsin, Vladimir, Kokkoris, M., Hamilton, A. and Grime, Geoffrey (2020) On the accuracy of Total-IBA Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 465. pp. 85-100.

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“Total-IBA” implies the synergistic use of multiple IBA techniques. It has been claimed that Total–IBA inherits the accuracy of the most accurate IBA technique used. A specific example is now given of this where (in vacuo) EBS/PIXE of a glass sample uniform in depth is validated against absolutely calibrated EPMA of the same sample. The EPMA results had a mass closure gap of 2.0 ± 0.6 wt%; the full PIXE analysis determined the composition of this missing 2 wt%. The PIXE calibration was against a single certified glass sample, with uncertainties per line ~10%. Benchmarking also demonstrates ~10% underestimation of the Si scattering cross-section at proton energies ~3 MeV. But the Total-IBA determination of the silica content had a low standard uncertainty of about 2%. This is due to the strong constraints of both the chemical prior and also the mass closure properties of the EBS. Irradiation-induced sodium migration in this soda-lime glass is explored.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
Kokkoris, M.
Hamilton, A.
Date : 21 January 2020
Funders : EPSRC
DOI : doi.10.1016/j.nimb.2019.12.019
Grant Title : EPSRC Grant
Copyright Disclaimer : © 2019 Elsevier B.V. All rights reserved.
Uncontrolled Keywords : Ion Beam Analysis; Particle-induced X-ray emission; Elastic backscattering; RBSSEM-WDX; XRF; Na migration; Precision; Benchmark;Rosslyn Chapel
Depositing User : James Marshall
Date Deposited : 30 Jan 2020 15:20
Last Modified : 30 Jan 2020 15:20

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