Conversion Electron Mössbauer Spectrometer

Conversion electron and conversion X-ray Mössbauer spectrometer

Conversion electron Mössbauer spectrometry (CEMS) and conversion X-ray Mössbauer spectrometry (CXMS) are a pair of methods with which help we can investigate Mössbauer radiation in backscattering geometry (BMS – Backscattering Mössbauer spectrometry). These methods are highly suitable for studying of phase analyses of surface layers and thin films due to a short range of conversion electrons (300 nm) and conversion X-rays (1-10 mm), respectively.

CEMS and CXMS are supporting methods in nanotechnology, material physics, metallurgy, chemistry, archeometry, geology and mineralogy. Recorded spectra can bear valuable information e.g. about corrosion processes and their inhibition (phosphatizing of steel, study of oxide layers), catalysis, magnetic structures, or investigation of changes in properties of wrought surfaces.

We are producer of CEMS/CXMS spectrometer CEMS2010 (fig. 1 left, 2).

CEMS2010 spectrometer (left). CEMS spectrum of iron(III) oxide film (right)

Operation parameters of the spectrometer:

Detection technique 57Fe Integral Mössbauer spectrometry of conversion electrons and conversion X-rays, respectively.

119Sn spectra can be recorded alternatively.

Detector type Proportional continuous gas flow counter for room temperature zero magnetic field measurements.

Counting mixture He + 0-25% CH4 (CEMS) or Ar + 0-25% CH4 (CXMS)

Detected radiation 7.3 keV K conversion electrons (CEMS) or 6.3 keV Ka conversion X-rays (CXMS)

Registration 2048 channels

Optional Spectrometer can be equipped by scintillation counter for simultaneous transmission Mössbauer spectrometry (TMS)

Requirements on specimens:

• Iron containing substance
• Solid-state compact or a powder material (e.g. core-shell particles)
• Maximal dimensions of 15 mm in diameter and up to 7 mm in thickness
• It is possible to carry out measurements on electrically conductive samples, semiconductors as well as on insulators

Offered services

• Custom-made production of CEMS/CXMS spectrometers

• Training courses for operating personal
• Installation
• Full service
• Mössbauer measurements on custom samples and its interpretations