1. 1 X 2  : NO C 2  : z z  = 3/2  = 1/2 Spin-orbit interaction Orbit-rot. interaction z  = 3/2  = 1/2 Spin-orbit interaction Orbit-rot. interaction

2. E1´E1´ E 1 ´´E 2 ´´ A v´´=0       Orbit-rot. interaction E2´E2´ C v´´=0 C v´ (2,1) (1,2) (1,1) (2,2) A v´ Orbit-rot. interaction      

3. Energy level expressions used for 2  1/2,3/2 <-<-<- 2  1/2,3/2 : E 1 ´´ = C v´´= 0 + A v´´= 0 + B 1 ´´J´´(J´´+1) – D 1 ´´J´´ 2 (J´´+1) 2 (1a) E 2 ´´ = C v´´= 0 +B 2 ´´J´´(J´´+1) – D 2 ´´J´´ 2 (J´´+1) 2 (1b) E 1 ´ = C v´ + A v´ + B 1 ´J´(J´+1) – D 1 ´J´ 2 (J´+1) 2 (2a) E 2 ´ = C v´ +B 2 ´J´(J´+1) – D 2 ´J´ 2 (J´+1) 2 (2b)