Isotopologues of HCN

Broadening coefficients for HCN

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


  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]