- #1
oliver.smith8
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I'm just going through a past paper for an exam I am revising for and I can't work out how to solve this question!
it's
" Total spin S, total orbital angular momentum L and total angular moment J are specified according to spectroscopic notation by the term symbol [tex]^{S+1}L_{J}[/tex]
i) For Helium show the the levels 1s2p and 1s3d include the terms [tex]^{1}P_{1}[/tex] and [tex]^{1}D_{2}[/tex]
ii) Determine allowed optical transitions between the [tex] ^{1}P_{1}[/tex] and [tex] ^{1}D_{2}[/tex] levels in the presences of an external magnetic field. How many transitions occur? How many spectral lines will be observed"
Ive got no idea where to start
it's
" Total spin S, total orbital angular momentum L and total angular moment J are specified according to spectroscopic notation by the term symbol [tex]^{S+1}L_{J}[/tex]
i) For Helium show the the levels 1s2p and 1s3d include the terms [tex]^{1}P_{1}[/tex] and [tex]^{1}D_{2}[/tex]
ii) Determine allowed optical transitions between the [tex] ^{1}P_{1}[/tex] and [tex] ^{1}D_{2}[/tex] levels in the presences of an external magnetic field. How many transitions occur? How many spectral lines will be observed"
Ive got no idea where to start