Specialization: 011200  Physics
Program: 13 Theoretical and Applied Spectroscopy of Molecular Systems
Head of the program: Doctor of Physics and Mathematics Sciences, Prof.  K. G. Tohadze
Department of Molecular Spectroscopy
Scientific advisor: Doctor of Physics and Mathematics Sciences, Prof. N.N. Filippov
Reviewer: Doctor of Physical and Mathematics Sciences, docent K. S. Rutkovskiy

Studies of infrared CO2 gas spectra at high pressures
Sinyakova T.N.

Carbon dioxide is one of key components of the terrestrial and planetary atmosphere. Its spectral characteristics are required in wide ranges of absorption frequencies, at various temperatures and pressures. In particular, for the atmosphere of Venus the pressure of interest is as high as 90 atm and the temperature reaches 730 K.
In the present work we report direct СО2  absorption measurements at such high gas pressure(up to 60 atm) in order to trace the line-mixing effects and to test some simple line-mixing models. Studies of room-temperature СО2 absorption spectra have been carried out by infrared Fourier transform spectroscopy in the spectral region from 600 – 7500 cm-1 . 
At high pressures, line-mixing effects become pronounced for the complete P-R/P-R-Q manifolds. Theoretical modeling of the recorded experimental band shapes is additionally presented and compared to the measurements.
The spectra were obtained with the core facility of RC "Geomodel" of SPbGU

The list of the publications
1.	N.N. Filippov, R.E. Asfin, T.N. Sinyakova, A.Yu. Kiseleva, T.M. Petrova, A.M. Solodov, A.A. Solodov, J.V. Buldyreva.
Studies of CO2 Spectra in the Region 600-9000 cm-1 at Pressures up to 60 atm.
The XVII Symposium on High Resolution Molecular Spectroscopy. July 02 - 07 2012. Zelenogorsk, St.Petersburg region. Russia. Book of Abstracts 110.
2.	T. Sinyakova.
Effect of the imaginary part of nondiagonal elements of the relaxation matrix on the rovibrational band shape.
International Student Conference "Science and Progress". 14 - 18 November 2011. St.Petersburg. Russia. Book of Abstracts 173.