Consider the Russell- Saunders coupling scheme for twonon-equivalent electrons in an excited 2p1 3d1 configuration. Forall parts (a) to (c) give your reasoning:
(a) Show that strong coupling between orbital angular momenta (ℓℓ coupling) gives rise to P, D and F terms with L magnitudes of2½ħ, 6½ħ and 12½ħ.
(b) If coupling between spin momenta (s-s coupling) isconsidered in addition to â„“ â„“ coupling, what six terms arise?
(c) If coupling between the orbit and spin angular momenta isalso considered (LS coupling), how many terms arise?
