“…The e parity rotational sublevels of the X 3 Σ and X 3 Σ states are mixed in rotational terms F 1 ( J ) and F 3 ( J ), while the f parity rotational sub‐level X 3 Σ corresponds to the F 2 ( J ) rotational term 1, 18, 36. Comparison with the observed lines intensity for the P,Q,R branches can be done for the a 1 Δ g − X 3 Σ( F i ) transitions by using the eigenfunctions of rotational sublevels of the X 3 Σ state 38 …”