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Diffraction of electrons at a polycrystalline lattice (Debye-Scherrer diffraction) /
Diffraction of electrons at a polycrystalline lattice (Debye-Scherrer diffraction)

Diffraction of electrons at a polycrystalline lattice (Debye-Scherrer diffraction)

P6.1.5.1

$Diffraction of electrons at a polycrystalline lattice (Debye-Scherrer diffraction)$

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Description
Components of equipment sets
Experiment Instructions

Description

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 4	Tube stand
1	521 70 8	High-voltage power supply, 10 kV
1	311 54 4	Precision vernier callipers
1	500 611 4	Safety experiment cable, 25 cm, red
1	500 621 4	Safety experiment cable, 50 cm, red
1	500 641 8	Safety experiment cable, 100 cm, red
1	500 642 4	Safety experiment cable, 100 cm, blue
2	500 644 8	Safety experiment cable, 100 cm, black

Experiment Instructions

PDF (Experiment description)

P6.1.5.1 Diffraction of electrons at a polycrystalline lattice (Debye-Scherrer diffraction)

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Diffraction of electrons at a polycrystalline lattice (Debye-Scherrer diffraction)

Description

Components of equipment sets

Experiment Instructions

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