Air pressure broadening and shifting of high-J lines of (00011) ← (00001) band of CO2 |
| |
Authors: | O.S. Gulidova |
| |
Affiliation: | Department of Physics, Saint-Petersburg State University, Peterhof, St. Petersburg 198504, Russia |
| |
Abstract: | The absorption spectra of carbon dioxide (isotope 626, natural abundance in air, ambient temperature) have been studied at total pressures 68-570 Torr with spectral resolution 0.003-0.005 cm−1. The spectra were measured in the spectral domain of 2273-2393 cm−1 by FTIR spectrometer Bruker IFS 125 HR equipped with White-type multipass cell (6.4-41.6 m) and with a cell having 10 cm optical path length. Pressure broadening and shift coefficients were obtained from a series of spectra by means of a nonlinear least-squares spectral fitting technique for the lines of the (00011)←(00001) band with rotational quantum number up to J=82. For fitting of the individual line shapes, we used the Voigt profile with pre-calculated Doppler broadening parameter. The experimental pressure broadening and shift coefficients are compared with the values available in spectroscopic databases HITRAN 2008 and Carbon Dioxide Spectroscopic Databank (CDSD-296) and with other experimental values reported in the literature. |
| |
Keywords: | Carbon dioxide Infrared spectra Fourier transform infrared (FTIR) spectroscopy Spectral lineshape |
本文献已被 ScienceDirect 等数据库收录! |
|