Na Ist excited state 1s2 2s2 2p6 3pl D1 written 3(2P) BUT two spins states? J(total ang.mom)=L+S or L-S now1s22s22p63s1=3(2P12)and3(2P32) Term Symbol 2S+ILJ Na 3p->3s fluorescence two lines at 5896 nm (2P3/2)and 589.0 nm (2P1/2) (SEmision0S1←Absorption_S0）】 CEM 333 page 5.3 Na 1st excited state 1s2 2s2 2p6 3p1 D1 written 3(2P) BUT two spins states? J (total ang. mom)=L+S or L-S now 1s2 2s2 2p6 3s1 = 3(2P1/2) and 3(2P3/2) Term Symbol 2S+1LJ Na 3p®3s fluorescence two lines at 589.6 nm (2P3/2) and 589.0 nm (2P1/2) S1 Emission ¾ ¾ ¾ ¾ ¾ ® S0 S1 Absorption ( ¬ ¾ ¾ ¾ ¾ ¾ S0 ) CEM 333 page 5.3