Atomic Spectroscopic Notation

  • #1
Forgive me if this has already been discussed. I've been searching and haven't found it. When summing the spin of an atom in the Russell-Saunders coupling scheme, some texts include the spin of an odd nucleon, and some don't. For example, if an atomic energy state is described as ${3}^P_{2}$, this means that the total spin is one, and since $L=1$, $J=S+L=2$. If this is a hydrogen atom, apparently, the spin of the proton is included. Many discussions of this never even bring up the nucleus. When should the spin of an odd nucleon be included?
 

Answers and Replies

  • #2
DrClaude
Mentor
7,607
4,009
When should the spin of an odd nucleon be included?
Never. The spin ##S## is the total electron spin.

Nuclear spin only comes into the quantum number ##F##. It is never part of the term symbol itself (the hyperfine state is stated in addition the term symbol, e.g., 2S1/2 ##F=1##).
 

Related Threads on Atomic Spectroscopic Notation

Replies
0
Views
925
Replies
3
Views
884
Replies
2
Views
5K
Replies
2
Views
3K
  • Last Post
Replies
1
Views
2K
Replies
2
Views
2K
  • Last Post
Replies
5
Views
835
  • Last Post
Replies
5
Views
6K
Top