(n1) state 1/(n2) state 2

R_AC (Å)

ΔE_AC (Hartree)

(2)²Δ/(3)²Δ

2.59

0.0189

(2)⁴Δ/(3)⁴Δ

2.17

0.0165

(2)²Σ⁺/(3)²Σ⁺

2.65

0.0099

(2)⁴Σ⁺/(3)⁴Σ⁺

2.38

0.0117

(1)²Π/(2)²Π

2.20

0.0130

(2)²Π/(3)²Π

1.69

0.0054

(2)⁴Π/(3)⁴Π

2.44

0.0072

(3)⁴Π/(4)⁴Π

2.23

0.0020