Principle
The X-rays that are generated by an X-ray tube are polychromatic. Numerous experiments (e.g. Debye-Scherrer experiments concerning crystal structures), however, require monochromatic X-radiation, which can be generated by filtering the X-rays with monocrystals or with the aid of metal foils.
Tasks
- Record the intensity of the X-rays emitted by the molybdenum anode as a function of the Bragg angle, using a LiF monocrystal as analyzer. The energy values of the characteristic molybdenum lines are to be calculated.
- Use the LiF monocrystal to filter out a characteristic line and record the appertaining monochromatization graphically
- Record the intensity of the X-rays emitted by the molybdenum anode as a function of the Bragg angle, using a LiF monocrystal as analyzer and a zirconium filter.
Learning objectives
- Bremsstrahlung
- Characteristic radiation
- Energy levels
- Absorption
- Absorption edges
- Interference
- Diffraction
- Bragg scattering.
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