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HandWiki. Spin-½. Encyclopedia. Available online: https://encyclopedia.pub/entry/33581 (accessed on 26 September 2026).
HandWiki. Spin-½. Encyclopedia. Available at: https://encyclopedia.pub/entry/33581. Accessed September 26, 2026.
HandWiki. "Spin-½" Encyclopedia, https://encyclopedia.pub/entry/33581 (accessed September 26, 2026).
HandWiki. (2022, November 09). Spin-½. In Encyclopedia. https://encyclopedia.pub/entry/33581
HandWiki. "Spin-½." Encyclopedia. Web. 09 November, 2022.
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In quantum mechanics, spin is an intrinsic property of all elementary particles. All known fermions, the particles that constitute ordinary matter, have a spin of 1/2. The spin number describes how many symmetrical facets a particle has in one full rotation; a spin of 1/2 means that the particle must be rotated by two full turns (through 720°) before it has the same configuration as when it started. Particles having net spin 1/2 include the proton, neutron, electron, neutrino, and quarks. The dynamics of spin-1/2 objects cannot be accurately described using classical physics; they are among the simplest systems which require quantum mechanics to describe them. As such, the study of the behavior of spin-1/2 systems forms a central part of quantum mechanics.
quantum mechanics
net spin
neutrino
References
- Resnick, R.; Eisberg, R. (1985). Quantum Physics of Atoms, Molecules, Solids, Nuclei and Particles (2nd ed.). John Wiley & Sons. ISBN 978-0-471-87373-0. https://archive.org/details/quantumphysicsof00eisb.
- Nave, C. R. (2005). "Electron Spin". Georgia State University. http://hyperphysics.phy-astr.gsu.edu/hbase/spin.html#c3.
- Rauch, Helmut; Werner, Samuel A. (2015). Neutron Interferometry: Lessons in Experimental Quantum Mechanics, Wave-Particle Duality, and Entanglement. USA: Oxford University Press.
- Griffiths, David J. (2018). Introduction to quantum mechanics. Darrell F. Schroeter (3 ed.). Cambridge, United Kingdom. ISBN 978-1-107-18963-8. OCLC 1030447903. https://www.worldcat.org/oclc/1030447903.
- McMahon, D. (2008). Quantum Field Theory. USA: McGraw Hill. ISBN 978-0-07-154382-8.
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