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Absorption of X-rays

Absorption of X-rays

Item no.: P2541101

Experiment Type: Teacher Experiment, Laboratory Experiment

Difficulty Expenditure of Time print
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Principle

The polychromatic X-radiation that is emitted by an X-ray tube is filtered in terms of its energy with the aid of a monocrystal. The resulting monochromatic radiation is used as the primary radiation source for examining the absorption behaviour of various metal foils of different thicknesses.

Tasks

  1. Determine the attenuation of the X-radiation by aluminium and zinc foils of different thicknesses and at two different wavelengths of the primary radiation.
  2. Determine the mass absorption coefficient μ / ρ for aluminium, zinc and tin absorbers of constant thickness as a function of the wavelength of the primary radiation. Prove the validity of μ /ρ = f (λ3 ) in a graphical manner.
  3. Determine the absorption coefficients µ for copper and nickel as a function of the wavelength of the primary radiation. Determine the energy values of the corresponding K shells based on the graphical representation. Prove the validity of μ /ρ = f (λ3 ).

What you can learn about

  • Bremsstrahlung
  • Characteristic radiation
  • Bragg scattering
  • Law of absorption
  • Mass absorption coefficient
  • Absorption edge
  • Half value thickness
  • Photoelectric effect
  • Compton scattering
  • Pair production

Supplied with software. Computer not provided.