Collisional effects on spectral line-shapes

摘要: Abstract The growing concern of mankind for the understanding and preserving its environment has stimulated great interest study planetary atmospheres and, first all, that Earth. Onboard spectrometers now provide more precise information on transmission emission radiation by these atmospheres. Its treatment ‘retrieval’ technics, in order to extract vertical profiles (pressure, temperature, volume mixing ratios) requires modeling infrared absorption spectra. Within this framework, accounting influence pressure shape is crucial. These effects inter-molecular collisions between optically active species ‘perturbers’ are complex various types depending mostly density perturbers. present paper attempts review illustrate, through a few examples, state art field. This be related with increasing quality laboratory or onboard instruments (frequency difference laser, Fourier transform, diode laser spectrometers,…) which nowadays data precision far above than what could achieved ten years ago. To cite article: C. Boulet, C. R. Physique 5 (2004).