Abstract

Twenty-five years of experience with cooling spectroscopic samples to planetary atmospheric temperatures in the laboratory, the acquisition of a state-of-the-art Fourier-transform spectrometer, and an accurate non-linear least-squares line-fitting routine have enabled us to obtain infrared line intensities, collision-broadened linewidths, lineshifts, and some aspects of the collision-broadened lineshape with unprecedented accuracy. We present in this paper some of the results obtained in our laboratory in the fundamental bands of CO, CO₂, N₂O, CH₄, CH₃D, C₂H₂, and NH₃ at temperatures and other conditions relevant to various planetary atmospheres. A critical comparison with other published work, including some well-known spectroscopic databases, and some revealing trends as to the variation of the spectral line parameters with temperature are presented.

© 1997 Optical Society of America