Abstract The photoabsorption of the imidogen (NH) radical is important in various astronomical and industrial processes. In particular, its photodissociation in the ultraviolet region is crucial for correct chemical modelling and dynamics. An updated spectroscopic model, named 2kNigHt, is presented for the 12 lowest electronic states of NH. This model is used to compute a new bound-bound line list up to 50 000 cm−1 for the four 14N1H, 14N2H, 15N1H, and 15N2H isotopologues. Temperature-dependent photoabsorption, continuum photoabsorption, and photodissociation cross sections, as well as associated photolysis rates under several important radiation fields, are computed. These cross sections cover wavelengths longer than the hydrogen Lyα line for temperatures up to 10 000 K. All results are made available in the ExoMol and ExoPhoto databases.
Perri et al. (Sat,) studied this question.