M. A. KOSHELEV, M. YU. TRETYAKOV, Institute of Applied Physics, Russian Academy of Sciences, Nizhnii Novgorod, Russia 603950; R. M. LEES, LI-HONG XU, Department of Physical Sciences, University of New Brunswick, Saint John, NB, Canada E2L 4L5.
Nitrogen and oxygen pressure-broadening and pressure-induced shift coefficients for 42 transitions of 16O12C32S with quantum number m from -25 to 49 in the P and R branches of the 3 band at 2062 cm-1 have been measured at room temperature using the UNB high-resolution tunable diode laser spectrometer. Significant dependence of the broadening coefficients on rotational quantum number is observed; the low-m limits are approximately 0.110 and 0.097 cm-1/atm for N2 and O2 broadening, respectively, decreasing to 0.085 and 0.072 cm-1/atm by m = 50. Air-broadening and shift parameters have also been calculated from the N2 and O2 measurements. The results show good consistency with previous measurements for the 1 and 2 3 bands but a slight deviation at high m from the coefficients for the 3 band reported in the GEISA and HITRAN databases.