16th International Conference on Particle-Induced X-ray Emission

24-29 March 2019 · Cultural and Congress Centre of Caldas da Rainha
Europe/Lisbon timezone

Unravelling secrets from atoms to planets

***** Next conferences will join PIXE and IBA ** in a virtual conference in 2021 and in person in 2023 in Japan ***** check the links *****

3 min. contribution by John L. Campbell

The current work of the European X-ray Spectrometry Association’s X-Ray Fundamental Parameters Initiative focuses mainly on the accuracy of XRF, with considerable attention to mass attenuation coefficients (MACs). The issue of the accuracy achievable by PIXE also needs attention to detectors, database and methodology if use of our method is to grow. This needs specific carefully designed experiments, not endless repeats of what was already done. For example, recent experiments at Guelph led us to change the GUPIX MAC database from XCOM to FAST for low energy K X-rays in low-Z absorbers. This step eliminated systematic errors for Na – Si in silicate rock analysis. Together with correcting for non-linearity it enabled agreement on average better than 1% for elements Na – Fe in silicate rocks and glasses. This accuracy level is necessary if potential PIXE users are to have confidence in our outcomes.

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