State 1

State 2

Avoided crossing between (n₁) state 1/(n₂) state 2

R_AC (Ǻ)

ΔE_AC (cm⁻¹)

⁴Δ

⁴Δ

2/3

2.4

608.73

⁴Δ

⁴Δ

2/3

3.1

665.25