Pair Production

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Pair Production

</dt>
An absorption process for X-ray and gamma ray radiation in which the incident photon is annihilated in the vicinity of the nucleus of the absorbing atom, with subsequent production of an electron and positron pair. </dd>
This reaction does not occur for incident radiation energies of less than 1.02 million electron volts. </dd>

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use