= Alfred Landé
{c}
{tag=Physicist}
{wiki}
<Alfred Landé> organized the magnetic response of coupled atomic <angular momenta>. The <Landé g-factor> relates a magnetic <energy> shift to the projection of total <angular momentum>, accounting for both <orbital angular momentum> and <spin>. For <LS coupling>, $g_J=1+[J(J+1)+S(S+1)-L(L+1)]/[2J(J+1)]$ when $J\ne0$, neglecting the small correction to the <electron spin g-factor>. For $L=0$ and $J=S=1/2$, it gives $g_J=2$. Different atomic terms therefore split differently in a weak <magnetic field>.<Zeemaneffekt und Multiplettstruktur der Spektrallinien by Ernst Back and Alfred Landé>[Anomalous Zeeman structure and coupling interpretation]{ref}
A <physicist>.https://history.aip.org/history/catalog/icos/3959.html[Biographical identity and professional specialization]{ref}
\Image[https://commons.wikimedia.org/wiki/Special:Redirect/file/Alfred_lande_1940.png?width=260]
{title=Portrait of <Alfred Landé>}
{description=Unknown photographer; private collection of the Landé family; portrait dated 1940. Public domain (author life plus 70 years, PD-old as tagged on Commons). https://creativecommons.org/publicdomain/mark/1.0/[Source usage terms], via Wikimedia Commons.}
{source=https://commons.wikimedia.org/wiki/File:Alfred_lande_1940.png}
{width=260}
Back to article page
