<P> Electron--positron annihilation occurs when an electron () and a positron (, the electron's antiparticle) collide . The result of the collision at low energies is the annihilation of the electron and positron, and the creation of gamma ray photons: </P> <Dl> <Dd> e + → γ + γ </Dd> </Dl>

What would happen if a positron meets an electron
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