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S. VOIGT, J. P. BURROWS, J. ORPHAL, Institute of Environmental Physics, University of Bremen, P. O. Box 330440, 28334 Bremen, Germany; A. KISSEL, H.-D. KRONFELDT, O. KURTZ, I. MEUSEL AND B. SUMPF, Institute of Optics, Technical University Berlin, Sekr. PN 0-1, Hardenbergstr. 36, 10623 Berlin, Germany.

In this paper we present results concerning line shift and line broadening in the fundamental band of different isotopomeres of carbon monoxide near 2058 cm^-1. The study includes lines of ¹²C¹⁶O and for the first time lines of ¹³C¹⁶O, ¹²C¹⁸O, ¹³C¹⁸O, and ¹³C¹⁷O perturbed by N₂, O₂, H₂, D₂, He, Ne, Ar, Kr, and Xe. The results for Kr, H₂, and D₂ represent the first experimental data for the (1<-0) band of CO. For all perturbers except helium all line-shift coefficients are negative. Within the experimental uncertainties the data show no significant dependence on the isotopomere. As known for ¹²C¹⁶O for collisions with noble gases the absolute value of the line-shift coefficients increase with increasing mass of the perturber. Lines from R-branches show smaller shift coefficients compared to P-branch lines. Our absolute values for the line-shift coefficients for the (1<-0) band confirm the trend that the effect for this band is smaller compared to the (2<-0) band as known from former experimental data by Bouanich et al. \footnoteJ.-P. Bouanich, D. Bermejo, J. L. Domenech, R. Z. Martinez, J. Mol. Spectrosc. 179, 22 (1996). The nitrogen broadening will be compared to previous measurements for ¹³C¹⁶O by Voigt et al. \footnoteS. Voigt, S. Dreher, J. Orphal, J. P. Burrows, J. Mol. Spectrosc. 180, 359 (1996).