= Polykarp Kusch
{c}
{tag=Physicist}
{title2=1911–1993}
{wiki}
= P. Kusch
{c}
{synonym}
<Polykarp Kusch> and <Henry Michael Foley> measured atomic <magnetic resonance> <frequencies> to determine the <electron magnetic moment>. Different <quantum states> weight <orbital angular momentum> and <spin> contributions differently, allowing ratios of magnetic responses to isolate the spin contribution. The inferred <electron spin g-factor> differs slightly from two. The <Kusch-Foley magnetic moment experiment> thus probes a microscopic interaction through accurately counted <frequencies>, rather than a mechanical measurement of an isolated <electron>.<The Magnetic Moment of the Electron by Polykarp Kusch and Henry Michael Foley (1948)>[Abstract: g-factor ratios and inferred electron spin moment]{ref}
A <physicist>.https://www.nasonline.org/wp-content/uploads/2024/06/kusch-polykarp.pdf[Independent professional profile]{ref}
\Image[https://commons.wikimedia.org/wiki/Special:Redirect/file/Polykarp%20Kusch.jpg?width=250]
{title=Portrait of <Polykarp Kusch>}
{description=Nobel Foundation; individual photographer unidentified. https://commons.wikimedia.org/wiki/File:Polykarp_Kusch.jpg[Commons PD-Sweden photograph claim, with a request for an additional US public-domain tag. Rights elsewhere are not independently determined.], via Wikimedia Commons.}
{source=https://commons.wikimedia.org/wiki/File:Polykarp_Kusch.jpg}
{width=250}
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