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IEVref:113-05-09ID:
Language:enStatus: Standard
Term: spin
Synonym1:
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Symbol: S
s
Definition: intrinsic angular momentum of a particle

NOTE 1 The expectation value of spin in any direction is s(s+1) MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGe aGqk0di9Wr=fpeei0di9v8qiW7rqqrVepeea0xe9LqFf0xc9q8qqaq Fn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpe WZqaaeaaciWacmGadaGadeaabaGaaqaaaOqaaKqzafGaeS4dHGMcda GcaaqaaiaadohacaGGOaGaam4CaiabgUcaRKqzaeGaaGymaOGaaiyk aaWcbeaaaaa@4029@ where s is spin quantum number and ħ is reduced Planck constant.

NOTE 2 The spin in a given direction is quantized as multiples or half-multiples of the reduced Planck constant. In the direction of the quantization axis z, the component of the spin is quantized as Sz = msħ, ms = s, s − 1, … − s, where ms is spin magnetic quantum number and s is spin quantum number.


Publication date:2011-04
Source:
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Internal notes:2014-07-10: Symbol <i>S, s</i> corrected to <i>S</i><br><i>s</i>. JGO
2016-01-07: Occurrence number (1) deleted in accordance with mail from WG 100 convenor of 2016-01-04. JGO

2017-06-02: Cleanup - Remove Attached Image 113-05-09en.gif
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