RiKon-5 CEMS Detector
The Conversion Electron Mössbauer Spectroscopy (CEMS) is highly suitable for the examination of thin films and layers close to the surface. Conversion electrons are counted, which are emitted as a consequence of the de-energizing process of the nucleus that follows after resonant absorption of the Mössbauer radiation.
The advantage of this method of investigating the surface with the use of a gas-flow proportional backscatter detector is the simple treatment of the samples (no high vacuum is necessary) and the fact that usual Mössbauer equipment can be expanded for this measuring method with only a little effort.
The RiKon-5 detector is an easy-to-operate 3-wire gas-flow proportional backscatter detector with excellent energy resolution, suitable for measurements in the temperature range between 100 K and room temperature. Liquid nitrogen serves as the cooling agent.
Features
- 3-wire gas-flow proportional backscatter detector
- Excellent energy resolution
- Temperature range: 100 K to room temperature
- Cooling agent: Liquid nitrogen
- Ability to investigate surface or entire sample
- Measurements at angles from 0° to approx. 60° between γ-direction and surface normal
Detecting Gases
| Conversion Electron Mössbauer Spectroscopy | |
|---|---|
| Room temperature | Helium/Methane mixture |
| Low temperature | Helium/Nitrogen mixture |
| X-ray Mössbauer Spectroscopy | |
| Room temperature | Argon/Methane mixture |
| Low temperature | Argon/Nitrogen mixture |
Performance Examples
57Co Pulse Height Spectrum (with Argon/Methane mixture):
- 6.4 keV x-ray-line: 22.7% linewidth
- 14.4 keV γ-line: 14.7% linewidth