MicroWave Spectroscopy Laboratory

Main directions of activity Studies of the molecular spectra

Studies of the molecular spectra by the developed experimental and theoretical methodics

A number of microwave high resolution molecular spectra were studied, some of types of them for the first time. These include vibrational spectra of non-polar molecules; submillimeter spectra of molecular complexes in equilibrium conditions, including the first observation of rotationally resolved water dimer spectrum in room-T water vapor; spectra; demonstration of clusterization of the energy levels of asymmetrical top molecules; microwave spectra of negative molecular ions (jointly with Lille University and J. Heyrovsky Institute of CSAV).

The new more accurate and having stronger predictional power theoretical methods of description of highly excited molecules spectra were developed and used. With the use of these methods, in particular, the water lines on the Sun were assigned for the first time (jointly with University College London).

Accurate bond dissociation energy of most abundant water molecule isotopologues were determined by triple-resonance vibrational spectroscopy and ab initio calculations (in collaboration with University College of London and Polytechnic school of Lausanne ).

A new approach for spectrum analysis of real gases was proposed including, in particular, reformulation of monomolecular state (read more). The physical mechanism responsible for super-Lorentzian behavior of line wings at large detuning from the center was revealed (read more), which allowed consistent interpretation of the excess continuum in water vapor within pure rotational and fundamental vibrational bands of H2O molecule (read more).


   Institute of Applied Physics of the Russian Academy of Sciences
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