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Configuration, term, level and states

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Top 10 Contributor
Posts 21
Jana Posted: 11-23-2008 9:52 PM

Given a term (2s+1)L, can anyone tell

1) what are the levels? How many are there?

2) What is the degeneracy of a level? When is it removed?

 

Top 10 Contributor
Posts 10

I was hoping to see the answer to this question ... so it's kinda late but I will give it a try, please correct it!

There are L+S, L+S-1, ... , Absolute value (L-S) levels

2J+1 is the degeneracy  

Top 10 Contributor
Posts 26

I think degeneracy is removed when you have spin-orbit coupling, when L{_dot}S .ne. 0, so this would be for any p,d,f... orbital with an unpaired electron..?

Top 10 Contributor
Posts 21

The spin-orbit coupling results in levels (quantum number J). The degeneracy of a level is removed in the presence of a magnetic field, giving rise to MJ states. So the degeneracy of a level is 2J+1.

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