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The effect was at first observed by [[Arthur Holly Compton]] in 1923 at Washington University in St. Louis. Compton was rewarded the 1927 [[Nobel Prize]] in Physics for this discovery.
The effect was at first observed by [[Arthur Holly Compton]] in 1923 at Washington University in St. Louis. Compton was rewarded the 1927 [[Nobel Prize]] in Physics for this discovery.
Arthur H. Compton ''treated the x-ray photons as particles and applied conservation of energy and conservation of momentum to the collision of a photon with a stationary electron.''<ref>[http://hyperphysics.phy-astr.gsu.edu/Hbase/quantum/compeq.html#c1 Compton Scattering Equation], ''Hyperphysics'', C. R. Nave, Georgia State University</ref>
Arthur H. Compton ''treated the x-ray photons as particles and applied conservation of energy and conservation of momentum to the collision of a photon with a stationary electron.''<ref>[http://hyperphysics.phy-astr.gsu.edu/Hbase/quantum/compeq.html#c1 Compton Scattering Equation], ''Hyperphysics'', C. R. Nave, Georgia State University</ref>. He used the [[Planck]] relationship and the [[E=mc²|relativistic energy expression]] to derive the ''standard Compton formula'':
<math>\Delta \lambda = \frac{h}{m_e c} (1-\cos \theta)</math>
Here, Δλ denotes the difference between the wavelengths of the incoming and the scattered ray, while θ is the angle of scattering.
The probability for Compton scattering is approximately proportional to Z, and for energies greater than 500 [[keV]] approximately proportional to 1/E<sup>gamma</sup>
The probability for Compton scattering is approximately proportional to Z, and for energies greater than 500 [[keV]] approximately proportional to 1/E<sup>gamma</sup>
[[category:physics]]
[[category:physics]]
== Reference ==
<references />