MEASUREMENT OF $N_{2}-$ BROADENED LINE WIDTHS OF CO AT LOW TEMPERATURES$^\dag$

$^{\dag}$ Supported by the Planetary Atmospheres Branch of the Solar System Exploration Division of NASA under Grant-in-Aid No. 33-015-139.Author Institution: Laboratory for Planetary Atmospheres Research, State University of New YorkAnalyses of CO spectra observed in the atmospheres of Earth and Titan require $N^{-}_{2}$ broadened line width data at low temperatures. We have, therefore, measured the $N^{-}_{2}$ broadened half-widths of several lines between P(1) and P(15) in the fundamental band of $^{12}C^{16}O$ at 100, 150, 200, 250, and 298 K in our laboratory. Employing a tunable diode laser spectrometer and the sweepintegration technique, the line widths ($cm^{-1} atm^{-1}$) have been found to vary with temperature according to the empirical power law: $\gamma^{\circ} \sim T^{-n}$ with $n = 0.746 \pm 0.016$