P6.1.5.1 Diffraction of Electrons at a Polycrystalline Lattice (Debye-Scherrer Diffraction) Leybold Physics Lab Experiment

Diffraction of Electrons at a Polycrystalline Lattice (Debye-Scherrer Diffraction) Experiment The experiment P6.1.5.1 demonstrates diffraction of electrons at polycrystalline graphite. As in the Debye-Scherrer method with x-rays, we observe diffraction rings in the direction of radiation which surround a central spot on a screen. These are caused by the diffraction of electrons at the lattice planes of microcrystals which fulfill the Bragg condition As the graphite structure contains two lattice-plane spacings, two diffraction rings in the first order are observed. The electron wavelength is determined by the acceleration voltage U, so that for the angular aperture of the diffraction rings we can say Components of Equipment Sets: 1 555 626 Electron diffraction tube 1 555 600 Tube stand 1 521 70 High-voltage power supply, 10 kV 1 311 54 Precision vernier callipers 1 500 611 Safety connecting lead, 25 cm, red 1 500 621 Safety connecting lead, 50 cm, red 1 500 641 Safety connecting lead, 100 cm, red 1 500 642 Safety connecting lead, 100 cm, blue 2 500 644 Safety connecting lead, 100 cm, black Instructions for Use Click Here Materials and equipment for teaching Physics labs, advanced science experiment apparatus, Leybold