Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Selection rules for helium

  1. Feb 15, 2012 #1
    Hi

    I am reading about transition in Helium, and I have come across a question. It is clear that triplet-singlet transition are not allowed, i.e. ΔS=0. But in my book (Foot's Atomic Physics) it says that Δl = ±1. This is what I don't understand. The selection rule Δl = ±1 we derived for Hydrogen, where there was no electrostatic interaction and only a single electron making the transition. In Helium we *do* have an electrostatic interaction and two electrons -- then how can we reuse Δl = ±1 again?

    Best,
    Niles.
     
    Last edited: Feb 15, 2012
  2. jcsd
  3. Feb 18, 2012 #2
    In a textbook I find that the rule of transition can be deducted by Einstein's A,B cofficients,and use the wavefunction of hydrogen.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook




Loading...
Similar Threads for Selection rules helium
B Superfluid Helium and its use at CERN
I Is the total Spin operator a vector