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Scramjet
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Specific electricity
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Sonography
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Polyunsaturated fatty acid
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Topocentric
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Kuroshio Current
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Ammonite
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Neurotrope
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Athetosis
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Bombesin
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Capacitor
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Playlist
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Unfractionated heparin
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Pont Farin
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Growth cone
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Tarragon
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Electrical resistance
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Ion channels
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Alter Eco
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Remitting fever
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Chemosynthesis
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Gram staining
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Varicella zoster virus
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Corolla
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Migmatite
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Disinfectants
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Premammalian
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Isomerase
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Addiction
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End-of-life vehicles
Positron
The positron is an antiparticle of the electron predicted in 1928 by Paul Dirac. It was discovered in 1932 in cosmic radiation by Carl David Anderson.
Carl Anderson performing an experiment. (Credits: Universe-review).
Positrons are, for example, produced by beta+ radioactivity and during the creation of electron/positron pairs by a gamma ray passing close to a nucleus (this is important for the conservation of momentum). Today they are used in medical imagery in Pet-Scans.
Creation of electron/positron pairs by gamma photons in a bubble chamber. The particles spiral under the action of a magnetic field (Credits: Universe-review).
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