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Home > Teams > LAsers, Molecules and Environment > Themes > Ultra-sensitive absorption spectroscopy

Ultra-sensitive absorption spectroscopy

Spectroscopy by CRDS of the methane in the near infrared region

The insufficient knowledge of the methane spectrum at low temperature was, during a long time, a major limitation to the spectral data analysis for some planets. On the basis of laboratory spectra recorded using high sensitivity laser techniques; the LAME team has recently managed to build an absorption line list for methane (CH4) in the 1.26-1.71 µm range. The WKMC (Wang Kassi, Mondelain & Campargue) allows simulating the methane spectrum between 80 and 300 K. It is about to become the reference list for planetology applications and it has already been applied with success to Titan, Pluto, Uranus, Saturn and Jupiter.

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