annihilation radiation

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annihilation radiation

physics

Also known as: annihilation photon

Learn about this topic in these articles:

interaction of radiation with matter

In radiation measurement: Pair production
…and are replaced by two annihilation photons, each with an energy of 0.511 MeV. Annihilation photons are similar to gamma rays in their ability to penetrate large distances of matter without interacting. They may undergo Compton or photoelectric interactions elsewhere or may escape from detectors of small size.
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