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Fig. 1: Schematic diagram of Compton's experiment. Compton scattering occurs in the graphite target on the left. The slit passes X-ray photons scattered at the selected angle and their average energy rate is measured using Bragg scattering from the crystal on the right in conjunction with an ionization chamber.
Diagram Beta decay: beta particle is emitted from an atomic nucleus Compton scattering: scattering of a photon by a charged particle Neutrino-less double beta decay: If neutrinos are Majorana fermions (that is, their own antiparticle), Neutrino-less double beta decay is possible. Several experiments are searching for this. Pair production and ...
Changed angle of electron so that the sum of photon and electron angles is not 90 degrees. This fact was recently discussed on the talk page to wikipedia:Compton_scattering, and that article now has a footnote stating the formula for both angles.... 20:45, 8 May 2007: 259 × 179 (6 KB) Choihei: This picture is from en.wikipedia by user JabberWok.
Category:Feynman diagrams Category:Compton scattering Category:Quantum mechanics: 06:55, 6 January 2010: 640 × 480 (32 KB) Dylan1946: Category:Feynman diagrams Category:Compton scattering Category:Quantum mechanics: 06:54, 6 January 2010: 640 × 480 (32 KB) Dylan1946: Category:Feynman diagrams Category:Compton scattering Category:Quantum mechanics
The formula describes both the Thomson scattering of low energy photons (e.g. visible light) and the Compton scattering of high energy photons (e.g. x-rays and gamma-rays), showing that the total cross section and expected deflection angle decrease with increasing photon energy.
The Feynman diagrams are much easier to keep track of than "old-fashioned" terms, because the old-fashioned way treats the particle and antiparticle contributions as separate. Each Feynman diagram is the sum of exponentially many old-fashioned terms, because each internal line can separately represent either a particle or an antiparticle.
For calcium (Z=20), Compton scattering starts to dominate at hυ=0.08 MeV and ceases at 12 MeV. [4] Subatomic particle pair production. The photon's energy is converted to particle mass in accordance with Einstein's equation, E = mc 2; where E is energy, m is mass and c is the speed of light.
The Compton wavelength is a quantum mechanical property of a particle, defined as the wavelength of a photon whose energy is the same as the rest energy of that particle (see mass–energy equivalence). It was introduced by Arthur Compton in 1923 in his explanation of the scattering of photons by electrons (a process known as Compton scattering).