pair production


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pair production

n.
The simultaneous creation of a subatomic particle and its antiparticle from another form of energy, especially the production of a positron and an electron from a gamma ray photon in a strong electric field, such as that surrounding a nucleus.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

pair production

n
(Nuclear Physics) the production of an electron and a positron from a gamma-ray photon in a strong field as that passes close to an atomic nucleus
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.pair production - the transformation of a gamma-ray photon into an electron and a positron when the photon passes close to an atomic nucleus
natural action, natural process, action, activity - a process existing in or produced by nature (rather than by the intent of human beings); "the action of natural forces"; "volcanic activity"
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References in periodicals archive ?
Photon processes include gamma conversion or pair production, photoelectric effect, Compton scattering, Rayleigh scattering, and muon pair production.
Photoelectric effect, Compton scattering, and pair production mechanisms can explain the interaction of photons with the GAGOC and CMO scintillator materials.
New York, NY, August 01, 2014 --(PR.com)-- Researchers from Creative Diagnostics have developed a more efficient workflow to manufacture and optimize the process of antibody pair production. On the basis, Creative Diagnostics is able to shorten the time required to prepare the immunoassays.
After it again starts increasing and becomes constant at around photon energy of 100 MeV in pair production region, various peaks in [mu]/[rho] values are observed for the glasses in photoelectric absorption region due to K-edge absorption (1.072, 8.333, and 8.8 keV), L-edge absorption (1.008, 1.586, 1.52, and 1.304 keV), and M-edge absorption (3.851, 3.554, 3.066, 2.586, and 2.484 keV).
Recalling that any sufficiently strong positive potential acting on the vacuum state enables electron-positron pair production to take place in free space (see any relativistic discussion of the Klein Paradox, e.g.
Photoelectric effect, Compton scattering, and pair production eject electrons from the atoms of the material.
We pumped the sample probe extensively to avoid trapped gasses in the coaxial leads, and then cooled the device slowly over two days to eliminate electron-hole pair production in the device (which creates additional electrons in the two-dimensional fluid and a slow downward drift in the magnetic field positions of QHR plateaus as the pairs recombine).
The ratio is greater than 1 at lower energies and goes to unity at LHC energies where the pair production mechanism dominates and complete nuclear transparency effects are observed.
This quark-antiquark annihilation and pair production model predicts the fourth generation of leptons and explains the measurements of neutrino oscillations.