What is Spin-orbit coupling? Explain if you expect to observe it in a ground state Na...
What is Spin-orbit coupling? Explain if you expect to observe it in a ground state Na atom (elec. conf. 1s2 2s2 sp6 3s1) or an excited Na atom with conf. 1s2 2s2 2p6 3s1?
Homework Answers
The interaction of the spin magnetic moment with the magnetic field arising from orbital angular momentum (an electron in an orbital with l>0) is called Spin-Orbit coupling.
It is observed in the Na spectra that D-Line (yellow emission) is split into two lines D1 (589.59 nm) and D2 (588.99 nm). The reason is that the energy levels split into two except S level (l=0)
The term arising from G.S configuration is 2S l is 0. S=1/2 so according to 2S+1LJ we get 2S1/2
for the first excited state terms is 2P l=1 s=1/2 now j can have two values= 1/2 and 3/2. Now this term will split into two energy levels 2P1/2 and 2P3/2
So it is expected in excited Na atom.
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Please don't just copy from somewhere. Explain clearly, even
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