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ifos • paper_2 • atomic_molecularifos-2017-subject-06-002

JJ coupling — UPSC IFoS 2017 Physics PYQ

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Consider two electrons system in (3p)^1(4s)^1 configuration. Derive the allowed energy states of the system in (i) LS coupling and (ii) jj coupling sketching the energy level diagram in each case. Name the interactions which are responsible for different splittings.

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