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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)

VP6.1.5.1

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

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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	555626	Electron diffraction tube
1	555600 4	Tube stand
1	52170 8	High-voltage power supply, 10 kV
1	31154 4	Precision vernier callipers
1	500611 4	Safety experiment cable, 25 cm, red
1	500621 4	Safety experiment cable, 50 cm, red
1	500641 8	Safety experiment cable, 100 cm, red
1	500642 4	Safety experiment cable, 100 cm, blue
2	500644 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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