Physics:Quantum positron: Difference between revisions
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The '''positron''' is the antiparticle of the electron. It has the same mass as the electron but positive electric charge<ref>{{Cite web |title=2022 CODATA Value: electron mass |url=https://physics.nist.gov/cgi-bin/cuu/Value?me |website=The NIST Reference on Constants, Units, and Uncertainty |publisher=NIST |date=2024-05 |access-date=2026-05-24}}</ref> and appears in beta-plus decay, pair production, and electron-positron annihilation.<ref>{{Cite journal |last=Dirac |first=P. A. M. |title=The quantum theory of the electron |journal=Proceedings of the Royal Society A |year=1928 |volume=117 |issue=778 |pages=610-624 |doi=10.1098/rspa.1928.0023}}</ref><ref>{{Cite journal |last=Anderson |first=C. D. |title=The Positive Electron |journal=Physical Review |year=1933 |volume=43 |issue=6 |pages=491-494 |doi=10.1103/PhysRev.43.491}}</ref> | '''positron''' is a Book II topic in the Quantum Collection. The '''positron''' is the antiparticle of the electron. It has the same mass as the electron but positive electric charge<ref>{{Cite web |title=2022 CODATA Value: electron mass |url=https://physics.nist.gov/cgi-bin/cuu/Value?me |website=The NIST Reference on Constants, Units, and Uncertainty |publisher=NIST |date=2024-05 |access-date=2026-05-24}}</ref> and appears in beta-plus decay, pair production, and electron-positron annihilation.<ref>{{Cite journal |last=Dirac |first=P. A. M. |title=The quantum theory of the electron |journal=Proceedings of the Royal Society A |year=1928 |volume=117 |issue=778 |pages=610-624 |doi=10.1098/rspa.1928.0023}}</ref><ref>{{Cite journal |last=Anderson |first=C. D. |title=The Positive Electron |journal=Physical Review |year=1933 |volume=43 |issue=6 |pages=491-494 |doi=10.1103/PhysRev.43.491}}</ref> The positron is important historically and conceptually because it confirmed the existence of antimatter predicted by relativistic quantum theory. When a positron meets an electron, the pair can annihilate into photons, converting rest mass into radiation. Positrons appear in beta-plus decay, pair production, positronium, particle detectors, and positron-emission tomography. | ||
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[[File:Quantum_positron_concept_map.svg|thumb|280px|positron in the Quantum Collection.]] | |||
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Latest revision as of 23:35, 23 May 2026
positron is a Book II topic in the Quantum Collection. The positron is the antiparticle of the electron. It has the same mass as the electron but positive electric charge[1] and appears in beta-plus decay, pair production, and electron-positron annihilation.[2][3] The positron is important historically and conceptually because it confirmed the existence of antimatter predicted by relativistic quantum theory. When a positron meets an electron, the pair can annihilate into photons, converting rest mass into radiation. Positrons appear in beta-plus decay, pair production, positronium, particle detectors, and positron-emission tomography.
See also
Table of contents (84 articles)
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4. Molecules (6) Back to index
5. Nuclear matter (6) Back to index
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7. Particles (12) Back to index
8. Composite particles (12) Back to index
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10. Vacuum and spacetime (12) Back to index
References
- ↑ "2022 CODATA Value: electron mass". NIST. 2024-05. https://physics.nist.gov/cgi-bin/cuu/Value?me.
- ↑ Dirac, P. A. M. (1928). "The quantum theory of the electron". Proceedings of the Royal Society A 117 (778): 610-624. doi:10.1098/rspa.1928.0023.
- ↑ Anderson, C. D. (1933). "The Positive Electron". Physical Review 43 (6): 491-494. doi:10.1103/PhysRev.43.491.
Author: Harold Foppele
Source attribution: Physics:Quantum positron
