15min:

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.