(n) the transformation of a gamma-ray photon into an electron and a positron when the photon passes close to an atomic nucleus, Syn. pair creation, pair formation
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
(Physics) The simultaneous creation of a particle and its antiparticle, such as an electron and positron, from a photon; -- usually due to its interaction with the strong field near a nucleus. [ PJC ]