Compton Scattering Angle

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This Demonstration shows an experimental setup for Compton scattering of gamma rays. The scattering angle is plotted as a function of detector angle.

Contributed by: Joost de Jong (July 2012)
Open content licensed under CC BY-NC-SA



For the GAMS (gamma spectroscopy) experiment at the University of Utrecht, the number of scattered gamma photons is counted as a function of their scattering angle. The theory is discussed in an earlier Demonstration on the Klein–Nishina formula. We require a coordinate transformation to give the scattering angle as a function of scatterer position . The positions of the radioactive source and detector can be varied to simulate the experimental setup.

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