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Exchange symmetry splitting in Helium

  1. Mar 15, 2006 #1
    In Helium we find that each energy level specified by (n,l) splits into two sub levels, a singlet and a triplet (this triplet is supposed to be degenerate)
    I'm sure that this triplet does not turn out to be degenerate because of fine structure. But I'm not sure if the fine structure splitting is smaller than the exchange symmetry splitting. If so, then we should find an observed triplet with small energy differences. If the fine structure splitting is greater than the exchange splitting, then we shouldn't even find a clear singlet - triplet patterm.
    thanks very much for your help.
  2. jcsd
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