K and L absorption edges of X-rays / Moseley’s law and the Rydberg constant

Samples of various elements of different atomic numbers are irradiated with X-rays of a known spectral distribution. The energy of the transmitted intensities is analyzed using a monocrystal analyzer. Subsequently, the Rydberg constant and the screening constants are calculated from the energy of the absorption edges.

Geiger-Mueller counter tube, type B, BNC cable 50 cm

XR 4.0 X-ray LiF crystal, mounted

XR 4.0 X-ray Diaphragm tube d = 2 mm

XR 4.0 X-ray Diaphragm tube d = 5 mm

XR 4.0 X-ray goniometer

XR 4.0 expert unit, X-ray unit, 35 kV

XR 4.0 Software measure X-ray

Data cable USB, plug type A/B, 1.8 m

Mortar w. pestle, 70ml, porcelain

Microspoon, steel

XR 4.0 X-ray Plug-in Cu tube

  1. Record the intensity of the X-rays emitted from the copper anode as a function of the Bragg angle using a LiF monocrystal as analyzer. Determine the K absorption edges of different absorber materials.
  2. Calculate the Rydberg constant and the screening constants from the energy values of  the K absorption edges.
  3. Find the L absorption edges of different absorber materials.
  4. Calculate the Rydberg constant from the energy values of the L absorption edges.
  • X-ray Bremsstrahlung
  • Characteristic radiation
  • Bragg equation
  • Bohr’s atomic model
  • Atomic energy level scheme
  • Moseley’s law
  • Rydberg constant
  • Screening constant

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Product number

P2541201

K and L absorption edges of X-rays Moseley's law and the Rydberg constant

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