SPECTRO

The group specializes in the spectroscopic analysis of molecular buildings around 5 major themes:

  • The observation and characterization of the signature in the centimeter, millimeter and sub-millimetric domain of radicals and astrophysical and pre-biotic molecules. These molecules are among the new targets targeted in the observations of the radio telescopes Herschel (space observatory), ALMA (Atacama Large Millimeter Array) and SOFIA (Stratospheric Observatory for Infrared Astronomy).
  • The spectroscopic study of volatile organic compounds (VOCs) of atmospheric interest and the study of molecules and halogen radicals involved in the ozone cycle. Prior laboratory analysis is essential for the identification of these molecules, their oxidation and degradation products as well as their hydrated complexes.
  • The study of line shapes to meet the needs of atmospheric physics. This involves measuring collisional widening and deviations from the traditional Voigt profile of rotation lines of molecules of atmospheric interest.
  • The precise determination of the equilibrium structure of molecules, combining quantum chemistry calculations and laboratory spectroscopy.
  • An optoelectronic approach for THz spectroscopy has been developed with a LTG-GaAs photoconductive antenna. It allows for example to address the question of the variation of the ratio between the mass of the electron and that of the proton.

The group is currently developing three main areas of research:

1) Laboratory Astrophysics

2) Environmental Sciences

3) Basic Physico-Chemistry