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What is the Process of Positron Annihilation?

April 26, 2017annihilation Positron process

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What is the Process of Positron Annihilation?

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The positron is the antiparticle of the electron. Its mean lifetime in materials is limited to (100-500)x10-12s due to its annihilation. In this process the mass of the electron-positron pair is converted into gamma radiation according to the Einsteins equation E=mc2. In order to conserve energy and momentum this radiation is emitted in the form of two collinear photons each of energy 511 KeV.