MEASUREMENTS OF N$_2$- AND O$_2$-PRESSURE-INDUCED BROADENING AND PRESSURE-INDUCED SHIFTS FOR $^{16}$O$^{12}$C$^{32}$S TRANSITIONS IN THE $\nu_3$ BAND

Abstract

Nitrogen and oxygen pressure-broadening and pressure-induced shift coefficients for 42 transitions of $^{16}$O$^{12}$C$^{32}$S with quantum number $m$ from -25 to 49 in the $P$ and $R$ branches of the $\nu_3$ 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 N$_2$ and O$_2$ 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 N$_2$ and O$_2$ measurements. The results show good consistency with previous measurements for the $\nu_1$ and 2$\nu_3$ bands but a slight deviation at high $m$ from the coefficients for the $\nu_3$ band reported in the GEISA and HITRAN databases.