pair-production

pair production

noun
Physics. the simultaneous creation of a particle and its antiparticle by a nucleus or particle in an excited state, as when a photon is absorbed.

Origin:
1930–35

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World English Dictionary
pair production
 
n
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 & Unabridged 10th Edition
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American Heritage
Science Dictionary
pair production   (pâr)  Pronunciation Key 
The simultaneous creation of a subatomic particle and its antiparticle from some other particle or a field fluctuation. A high-energy gamma ray photon, for example, can spontaneously create an electron-positron pair in a strong electric field. Pair production is essential to theories of particle physics; pair production from gamma rays is used to detect such rays in pair production telescopes, since electrons and positrons are easily detected.
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