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This results in the release of two photons each of 0.51 MeV known as annihilation radiation . These two photons then lose energy by Compton scattering or the photoelectric effect . Pair production is illustrated in Fig.
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www.triumf.ca/safety/rpt/rpt_2/node20.html
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Photons of sufficiently high energies can interact with the Coulomb field of an atomic nucleus to be transformed into an electron positron pair.
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en.wikipedia.org/wiki/File:Pairproduction.png
en.wikipedia.org/wiki/File:Pairproduction.png
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this is pair production, in which a pair of elementary particles (a particle and its antiparticle of the same mass but opposite electrostatic charge) are created from the energy (hf) of the original photon. ... Pair production can be represented by an equation which represents the conservation of total energy (or mass-energy):
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physics.pdx.edu/~egertonr/ph311-12/pair-p&a.htm
physics.pdx.edu/~egertonr/ph311-12/pair-p&a.htm
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Figure 3: Pair production due to ion colliding with soft photon from polar cap emission above the polar cap with . Beside ions, the outflowing charges may include positrons.
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www.atnf.csiro.au/pasa/15_2/luo/paper/node3.html
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Pair production is a direct conversion of radiant energy to matter. It is one of the principal ways in which high-energy gamma rays are absorbed in matter. For pair production to occur, the electromagnetic energy, in a discrete quantity called a photon, must be at least equivalent to the mass of two electrons.
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abyss.uoregon.edu/~js/glossary/pair_production.html
abyss.uoregon.edu/~js/glossary/pair_production.html
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The pair telescope is a technology which in its original form as a spark chamber was borrowed directly from the world of high-energy physics. At energies above about 30 MeV, pair production is the dominant photon interaction in most materials.
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imagine.gsfc.nasa.gov/docs/science/how_l2/pair_telescop...
imagine.gsfc.nasa.gov/docs/science/how_l2/pair_telescopes.html
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Twisted Pair Productions is a Brisbane based audio / visual production company who specialise in sound system setup for live audio events. Our qualified audio engineers can install and manage audio & visual equipment for your event.
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www.twistedpairproduction.com/
www.twistedpairproduction.com/
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Title:; Electron positron pair production by photons: A historical overview ... This account briefly traces the growth of our theoretical and experimental knowledge of electron positron pair production by photons, from the prediction of the positron by Dirac [1928a. The quantum theory of the electron.
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adsabs.harvard.edu/abs/2006RaPC...75..614H
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Top pair production cross section in the lepton+jets channel using b-tagging ... The production cross section ... Particularly interesting would be to measure a production rate which is incompatible with the prediction from theory, as this would imply new and unknown physics. To measure the production cross section we first...
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www-d0.fnal.gov/Run2Physics/WWW/results/final/TOP/T05B/...
www-d0.fnal.gov/Run2Physics/WWW/results/final/TOP/T05B/T05B.htm
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