Fine Structure of theC²Π-A²Σ⁺andD²Σ⁺-A²Σ⁺Band Systems of the NO Molecule: Homogeneous and Heterogeneous Perturbations

The fine structure of the NO C 2 Π → A 2 Σ + (0-0) and D 2 Σ + → A 2 Σ + (0-0) bands have been resolved with a high resolution Fourier Transform Spectrometer. The interactions of the three electronic states C 2 Π, D 2 Σ + , B 2 Π have been carefully analysed. Homogeneous and heterogeneous perturbations were reduced taking account the influence of the B 2 Π (ν = 7, 8, 9, 10) vibrational levels on the levels C 2 Π (ν = 0) and D 2 Σ + (ν = 0). Accurate energy values are derived for the low lying rotational levels of the C 2 Π (ν = 0) level.