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Klein-Nishina formula
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English
Etymology
Named after Oskar Klein and Yoshio Nishina who derived the equation in 1928.
Proper noun
en particle physics A formula for the differential cross section of photons scattered from a single free electron, calculated in the lowest order of quantum electrodynamics: where is the classical electron radius, is the ratio of the wavelengths of the incident and scattered photons, and is the scattering angle (0 for an undeflected photon).
Further reading
en eponyms