INTENSITY AND LINEWIDTH MEASUREMENTS IN THE 13.7 MU-M FUNDAMENTAL BANDS OF (C2H2)-C-12 AND (C13CH2)-C-12 AT PLANETARY ATMOSPHERIC TEMPERATURES

The absolute intensities and collision-broadened half-widths of several lines in the P-, Q-, and R-branches of the nu-5-fundamental band of (C2H2)-C-12 have been measured at various temperatures between 147 and 295 K employing the Doppler-limited spectral resolution (approximately 10(-4) cm-1) of a tunable diode laser spectrometer. The absolute intensities of R(5), R(7), R(9), and R(20) in the same fundamental belonging to (CCH2)-C-12-C-13 have also been measured at 294 K. The temperature dependence of the collision-broadened half-width has been determined for some of the lines broadened by planetary atmospheric gases, namely, He, Ar, H-2, and N2. Four self-broadened linewidths of (C2H2)-C-12, as well as three H-2-broadened linewidths and a self-broadened half-width of (CCH2)-C-12-C-13, have also been retrieved from our measurements.