Principle
Various alloyed materials are subjected to polychromatic X-rays.
The energy of the resulting fluorescence radiation is analysed with
the aid of a semiconductor detector and a multichannel analyser.
The energy of the corresponding characteristic X-ray fluorescence
lines is determined. In order to determine the concentration of the
alloy constituents, the intensity of their respective fluorescence
signals is compared to that of the pure elements.
Tasks
- Calibration of the semiconductor energy detector with the aid
of the characteristic radiation of the tungsten X-ray
tube.
- Recording of the fluorescence spectra that are produced by the
alloyed samples.
- Recording of the fluorescence spectra that are produced by the
pure metals.
- Determination of the energy values of the corresponding
fluorescence lines.
- Calculation of the concentration levels of the alloy
constituents.
What you can learn about
- Bremsstrahlung
- Characteristic X-radiation
- Energy levels
- Fluorescent yield
- Auger effect
- Coherent and incoherent photon scattering
- Absorption of X-rays
- Edge absorption
- Matrix effects
- Semiconductor energy detectors
- Multichannel analysers
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