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- 2006 (11) (entfernen)
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- Vortrag (6)
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Schlagworte
- Calibration (1)
- Detection efficiency (1)
- Detection limits (1)
- EDS (1)
- EPMA (1)
- Energy dispersive X-ray spectrometry (1)
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- Spectrometer calibration (1)
- Standardless analysis (1)
- WDS (1)
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- myXRF at SEM (1)
Eingeladener Vortrag
- nein (6)
A calibration procedure for the detection efficiency of energy dispersive X-ray spectrometers (EDS) used in combination with scanning electron microscopy (SEM) for standardless electron probe microanalysis (EPMA) is presented. The procedure is based on the comparison of X-ray spectra from a reference material (RM) measured with the EDS to be calibrated and a reference EDS. The RM is certified by the line intensities in the X-ray spectrum recorded with a reference EDS and by its composition. The calibration of the reference EDS is performed using synchrotron radiation at the radiometry laboratory of the Physikalisch-Technische Bundesanstalt. Measurement of RM spectra and comparison of the specified line intensities enables a rapid efficiency calibration on most SEMs. The article reports on studies to prepare such a RM and on EDS calibration and proposes a methodology that could be implemented in current spectrometer software to enable the calibration with a minimum of operator assistance.