pair creation

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Noun1.pair creation - 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 ?
Except for the purely magnetic case, the EHL has also an imaginary part related to vacuum pair creation by the electric field component (to be called "Sauter-Schwinger pair creation" in the following) [18, 19].
The nonperturbative dependence of the Schwinger-exponentials on the field supports the interpretation of field-induced pair creation as a vacuum tunneling effect, as proposed by Sauter as early as 1931 [18].
Then, given the experimental fact of electron-positron pair creation, it is reasonable to conclude that the incident free electron creates such pairs when it "collides" with the stressed portion of the vacuum (z > 0), the positrons (Dirac "holes") proceeding to the right into the vacuum after the collision [8, fig.