pair production(redirected from Pair processes)
Also found in: Dictionary, Thesaurus, Medical.
pair productionThe conversion of a high-energy (>1.022 MeV) gamma-ray photon, usually in the field of an atomic nucleus, into an electron and positron, which are formed simultaneously. See also annihilation; photon-photon absorption.
pair production[′per prə‚dək·shən]
The conversion of a photon into an electron and a positron when the photon traverses a strong electric field, such as that surrounding a nucleus or an electron.