Technical data

Duane-Hunt displacement law and Planck's "quantum of action"

Article no: P2540905

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Principle

X-ray spectra are recorded as a function of the anode voltage. The short wavelength limit of the bremsspectrum is used to determine the agreement with the Duane-Hunt displacement law, and to determine Planck's "quantum of action".

Tasks

Record the intensity of the X-rays emitted by the copper anode at various anode voltages as a function of the Bragg angle using an LiF monocrystal.
Determine the short wavelength limit (= maximum energy) of the bremsspectrum for the spectra obtained in (1).
Use the results to verify the Duane-Hunt displacement law, and to determine Planck's "quantum of action".

Learning objectives

X-ray tube
Bremsstrahlung
Characteristic X-ray radiation
Energy levels
Crystal structures
Lattice constant
Interference
Bragg equation

Scope of delivery

XR 4.0 expert unit, 35 kV	09057-99	1
XR 4.0 X-ray goniometer	09057-10	1
XR 4.0 X-ray Plug-in with copper tube (Cu)	09057-51	1
XR 4.0 X-ray solid state physics upgrade set	09125-88	1