Measurements of CO2 line parameters in the 9250–9500 cm−1 and 10,700–10,860 cm−1 regions

摘要: Abstract The absorption spectra of carbon dioxide have been recorded in two wavenumber ranges 9250–9500 cm −1 and 10,700–10,860 cm the near infrared region using a Bruker IFS 125 HR Fourier transform spectrometer 30 m multipass cell with White type optical system. were at spectral resolution 0.03 cm , room temperature, path length 726.7 m four pressures ranging from 187 to 674 mbar. achieved sensitivity (noise equivalent absorption) level k ν =7.2×10 −10  cm allowed detection numerous new transitions intensity values down 5×10 −29  cm/molecule. respective measurement time is about 20 h. multispectrum fittings Voigt profile performed retrieve line positions intensities 12 observed bands. Three hot bands C 16 O 2 detected for first time. 30032−00001 30033−00001 20032−00001 band 18 measured uncertainty position determination estimated be 0.001 cm unblended lines high value signal-to-noise ratio. varies 5% 40% depending on strength extent overlapping. together those published 00051−00001 used fit effective dipole moment parameters Δ P =15 series transitions, where =2 V 1 + +3 3 polyad number ( i =1,2,3) are vibrational quantum numbers). fitted reproduce within experimental uncertainties. Comparison contained HITRAN, GEISA, CDSD AMES lists given.