Note: unless otherwise stated, the broadening coefficients for the principal (most abundant) isotopologue can be used for other isotopologues of the same molecule.

• 1H-12C-14N__H2.broad [435 bytes]
  HCN - H2 pressure broadening parameters (main isotopologue)
• 1H-12C-14N__He.broad [497 bytes]
  HCN - He pressure broadening parameters (main isotopologue)
• 1H-12C-14N__air.broad
  HCN - air pressure broadening parameters (main isotopologue).

References

1. Mehrotra, S. C., Mader, H., de Vreede, J. P. M., Dijkerman, H. A., "J-dependence of self-, H₂- and He-broadened linewidth parameters for l-type doublet transitions in the bending vibrational state (01¹0) of HCN", Chemical Physics 93, 115-125 (1985). [link to article][85MeMaVr.NHC]
2. Cohen, J. B., Wilson, E. B., "Rotational energy transfer in pure HCN and in HCN‐rare gas mixtures by microwave double resonance and pressure broadening", Journal of Chemical Physics 58, 442-455 (1973). [link to article][73CoWixx.HCN]
3. Charron, M., Anderson, T. G., Steinfeld, J. I., "Measurements of T₂ in excited vibrational states of HCN", Journal of Chemical Physics 73, 1494-1497 (1980). [link to article][80ChAnSt.HCN]
4. Guest, E.R., Tennyson, J., Yurchenko, S.N., "Modelling the Rotational Dependence of Line Broadening using Machine Learning", Journal of Molecular Spectroscopy 401, 111901 (2024). [link to article]