Knowledge Bank

Analyses of CO spectra observed in the atmospheres of Earth and Titan require $N2-$ broadened line width data at low temperatures. We have, therefore, measured the $N2-$ broadened half-widths of several lines between P(1) and P(15) in the fundamental band of $\mathrm{<mrow\; data-mjx-texclass="ORD">12</mrow>}C16O$ at 100, 150, 200, 250, and 298 K in our laboratory. Employing a tunable diode laser spectrometer and the sweepintegration technique, the line widths ($cm-1atm-1$) have been found to vary with temperature according to the empirical power law: $\gamma \circ \sim T-n$ with $n=0.746\pm 0.016$.