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Positron
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<p>The positron or antielectron is the particle with an <a href="/facts/Electric_charge/xxsBfmlB">electric charge</a> of +1<i><a href="/facts/Elementary_charge/lPcj6CoQ">e</a></i>, a <a href="/facts/Spin_(physics)/4Jvp7e8P">spin</a> of 1/2 (the same as the electron), and the same <a href="/facts/Electron_rest_mass/xlG83aQl">mass as an electron</a>. It is the <a href="/facts/Antiparticle/7Ic43ThI">antiparticle</a> (<a href="/facts/Antimatter/NvpGDLof">antimatter</a> counterpart) of the <a href="/facts/Electron/L0KBo5cW">electron</a>. When a positron collides with an electron, <a href="/facts/Annihilation/tm55RWnf">annihilation</a> occurs. If this collision occurs at low energies, it results in the production of two or more <a href="/facts/Photon/mFNhAEzA">photons</a>. </p><p>Positrons can be created by <a href="/facts/Positron_emission/psWp4bJT">positron emission</a> radioactive decay (through <a href="/facts/Weak_interaction/f6upmKMs">weak interactions</a>), or by <a href="/facts/Pair_production/MmN9EUG0">pair production</a> from a sufficiently energetic <a href="/facts/Photon/mFNhAEzA">photon</a> which is interacting with an atom in a material. </p>