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Spin-orbit coupling (Read 2679 times)
Gerrit-Jan Linker
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Spin-orbit coupling
28.02.08 at 10:19:46
 
SOC: Spin-Orbit Coupling
 
In light atoms (generally Z<30), electron spins si interact among themselves so they combine to form a total spin angular momentum S. The same happens with orbital angular momenta li, forming a single orbital angular momentum L.  
 
The interaction between the quantum numbers L and S is called Russell-Saunders coupling or LS coupling or Spin-Orbit coupling (SOC). Then S and L add together and form a total angular momentum J.  
J = L+S ... |L-S|
 
Spin-orbit coupling is a relativistic effect.
 
In heavier atoms the situation is different. The total angular momentum j=l+s couple to form J. This is called jj coupling.
 
See also:
Term symbols
http://www.oraxcel.com/cgi-bin/yabb2/YaBB.pl?num=1238655847/0#0
 
Source:
Angular momentum coupling
http://en.wikipedia.org/wiki/Angular_momentum_coupling#Spin-orbit_coupling
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« Last Edit: 18.06.12 at 12:41:31 by Gerrit-Jan Linker »  

Gerrit-Jan Linker
Linker IT Software
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