2
$\begingroup$

When was the fact that a spin could only have values S = n/2 derived? I cannot find any source that says when.

$\endgroup$
  • $\begingroup$ @Spencer That does not have anything to do with the history of spin. $\endgroup$ – HDE 226868 Dec 10 '16 at 14:39
  • $\begingroup$ @Spencer Please note that questions on other sites cannot be the target of a duplication on Stack Exchange sites. If you think this question does not belong on this site, you can flag it as such. $\endgroup$ – Danu Dec 10 '16 at 19:22
2
$\begingroup$

Quantization of spin was discovered experimentaly by Stern and Gerlach in 1922. See Wikipedia article "Stern-Gerlach experiment". The correct theoretical model for spin was constructed by Pauli and Dirac in 1928.

$\endgroup$
  • $\begingroup$ Although a shout-out to Samuel Goudsmit might also be in order for proposing intrinsic electron spin, not just atomic spin, in 1925 (published in Nature in 1926). $\endgroup$ – Jon Custer Dec 13 '16 at 18:40

Not the answer you're looking for? Browse other questions tagged or ask your own question.