Re-investigation of the infrared spectrum of the NCN radical by laser magnetic resonance spectroscopy

Collision-induced state-changing rate coefficients for cyanogen backbones NCN 3Σ− and CNN 3Σ− in astrophysical environments

“…In the present study we omitted the inclusion of the much smaller centrifugal distorsion D and the even smaller l spin-spin interactions. Hence we have included the primary rotational constants B e , given in the previous section, and the spin-rotation coupling constants g obtained from the literature: Ganser et al 37 and Curtis et al 38 The lower-lying rotational energy levels when spin-rotation effects are included are given by Fig. 6.…”