Technical data

Compton effect

Article no: P2524415

Principle

When photons are scattered on electrons, their momentum and energy gets changed. The energy of scattered gamma-radiation is measured as a function of the angle of scatter. The Compton wavelength is determined from the measured values.

Benefits

Experience the essence of the Nobel Prize: Compton (1927)
Nobel Prize experiment can be performed by students within some hours
Impressive second proof of the wave-particle dualism
Use of a gamma detector in combination with a high precision power supply guarantees good and reproducible results

Tasks

Calibrate the measuring set-up with the aid of a Cs-137 calibrating source (37 kBq) and a Na-22 source (74 kBq).
Measure the energy of the Cs-137 661.6 keV peaks scattered at different angles and calculate the Compton wavelength from the readings taken.

Learning objectives

Corpuscle
Scattering
Compton wavelength
g-quanta
de Broglie wavelength
Klein-Nishina formula

Scope of delivery

PHYWE Multichannel Analyser (MCA)	13727-99	1
measure Software multi channel analyser	14452-61	1
Radioactive source Cs-137, 37 kBq	09096-01	1
Radioactive source Cs-137, 18.5 MBq	09096-20	1
Gamma detector	09101-00	1
PHYWE High precision power supply 1.5 kV DC	09107-99	1
Screening cylinder for gamma detector	09101-11	1
Rod, iron, d 25 mm, l 200 mm	09101-13	1
Lead block, 200x100x50 mm	09029-11	1
Lead brick with hole	09021-00	1
Source holder on fixing magnet	09202-00	1
Screened cable, BNC, l = 1 m	07542-11	1
High-voltage connecting cable	09101-10	1