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- In addition to the photoelectric effect (photon absorption) and Compton scattering (photon scattering), there is a third process by which photons can lose energy in their interaction with matter. In this process, termed pair production, a photon can simply vanish and in its place a matter-antimatter pair of particles can appear.
Pair production often refers specifically to a photon creating an electron–positron pair near a nucleus. As energy must be conserved, for pair production to occur, the incoming energy of the photon must be above a threshold of at least the total rest mass energy of the two particles created.
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If a photon enters matter with an energy in excess of 1.022 MeV, it may interact by a process called pair production. The photon, passing near the nucleus of an atom, is subjected to strong field effects from the nucleus and may disappear as a photon and reappear as a positive and negative electron pair.
Learn about radiation interactions including Compton scattering, the photoelectric effect, pair production, photodisintegration, and Bragg Peaks.
In addition to the photoelectric effect (photon absorption) and Compton scattering (photon scattering), there is a third process by which photons can lose energy in their interaction with matter. In this process, termed pair production, a photon can simply vanish and in its place a matter-antimatter pair of particles can appear.
Pair production, in physics, the production of a particle-antiparticle pair from the decay of a neutral particle or from a pulse of electromagnetic energy traveling through matter, usually in the vicinity of an atomic nucleus.
- The Editors of Encyclopaedia Britannica
Pair Production refers to the process in which a high-energy gamma ray is converted into an electron-positron pair in the presence of a charged particle, with conservation of momentum requiring the involvement of a third body to balance the momentum.
Jul 5, 2024 · At high energies, approximately equal to or greater than 100 MeV, pair production is the dominant mechanism of radiation interaction with matter. Clearly, as the photon energy increases, the dominant interaction mechanism shifts from photoelectric effect to Compton scattering to pair production.
