Absolute line intensities and self-broadening coefficients in the ν1 band of 35Cl12C14N

The self-broadening coefficients and the intensities of 29 lines in the nu (1) band of cyanogen chloride ((ClCN)-Cl-35-C-12-N-14) have been measured at high resolution in the range 699-736 cm(-1), using a tunable diode-laser spectrometer. The collisional widths and most of the intensities are obtained by fitting Voigt and Rautian profiles to the measured shapes of the lines. From the analysis of the line intensities we determine the absolute strength as well as the Herman-Wallis factors for the nu (1) band. A semiclassical calculation of the self-broadening coefficients, performed by considering the main electrostatic interactions only, has provided larger results than the experimental data. (C) 2001 Academic Press.