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• The O2 absorption spectra induced by CO2 pressure in the 13,000–13,260 cm−1 region. • The accurate parameters of 40 O2 absorption lines induced by CO@ pressure were obtained. High-resolution spectra of O 2 broadened by CO 2 pressure with high signal/noise ratio (2500 at the absorbance equal 1) were recorded with a Bruker IFS 125 FTIR spectrometer in the 13,000–13,260 cm−1 spectral region. The multispectrum fitting procedure has been applied to recover the spectral line parameters from measurements using the Voigt and speed-dependent Voigt (SDV) profiles. The O 2 absorption line parameters for 40 transitions were measured. The parameters for SDV profile were studied for the first time. The uncertainty of the broadening coefficients for the unblended O 2 absorption lines was estimated to be <3 %. The determined parameters were compared to HITRAN2020 and literature data. The values of the self-broadening coefficients and intensities were in good agreement with literature data. [Display omitted] [ABSTRACT FROM AUTHOR]

• The H 2 O absorption spectra induced by CO2 pressure in the 5150–5550 cm–1 region. • The CO 2 -broadening and shift coefficients of about 170 H 2 O lines were obtained. • The calculations of line broadening and shift coefficients were performed using the semi-empirical method. The high-resolution H 2 O absorption spectra induced by CO 2 pressure have been recorded using a Bruker IFS 125 HR FTIR spectrometer at room temperature in the 5150–5550 cm–1 spectral region. A multispectrum fitting procedure has been applied to these spectra to recover the spectral line parameters using the speed-dependent Voigt profile. The water vapor line broadening and shift coefficients for lines of two vibrational bands ν 2 +ν 3 and ν 1 +ν 2 were obtained. An uncertainty of the broadening coefficients for the unblended H 2 O absorption lines was estimated to be 2–3%. The calculations of line-broadening and line-shifting parameters were performed using the semi-empirical method which is based on the impact theory and enables a realistic prediction modified by introducing additional parameters obtained by using empirical data. The root mean square deviations of measured and calculated line widths and shifts were 0.0086 and 0.0053 cm−1 atm−1, respectively. [ABSTRACT FROM AUTHOR]

[Display omitted] • Bruker IFS 125 HR Fourier transform spectrometer with LED light source and optical path length of about 1 km reaches the sensitivity of 1.23 × 10-10 cm−1 near 660 nm. • First observation of the 3005 i − 00,001 (i = 2,3) and 60031–00001 absorption bands of 12C16O 2 near 660 nm. • Measured line positions and intensities of the 3005 i − 00,001 (i = 2,3) and 60031–00001 bands of 12C16O 2. • HITRAN2020 line parameters for the studied bands should be updated. The absorption spectra of carbon dioxide were recorded in the region from 15,000 to 15,300 cm−1, using a Bruker IFS 125 HR Fourier transform spectrometer and a 30 m multipass cell with the White type optical system. The recording was performed at a spectral resolution of 0.044 – 0.050 cm−1, room temperature, a path length of 1057.95 m and pressures of 185 and 362 mbar. Utilization of a LED as a light source provided a sensitivity (noise equivalent absorption) at the level of k ν = 1.23 × 10-10 cm−1 and allowed detection of a number of lines of two 3005 i − 00001 (i = 2,3) bands and several lines of the 60031 – 00001 band of 12C16O 2 with the intensity values down to 10-30 cm−1/(molecule cm−2) at 296 K. These bands were observed for the first time. The uncertainty of the line position measurements was estimated to be about 0.005 cm−1 for the unblended lines with a high signal-to-noise ratio. The uncertainties of the retrieved line intensities for the strongest unblended lines are at the level of 15 %. The spectroscopic constants for observed bands were fitted to the observed line positions. The vibrational transition dipole moments squared of these bands were fitted to the observed line intensities. The measured line positions were compared to those from the HITRAN2020 database and to those predicted with the global effective Hamiltonian. The measured line intensities were compared to the values from the HITRAN2020 database and from the Ames2021 line list. [ABSTRACT FROM AUTHOR]

The absorption spectra of carbon dioxide have been recorded in the near infrared region from 10,000 to 10,300 cm -1 , using the Bruker IFS 125 HR Fourier transform spectrometer and a 30 m multipass cell with the White type optical system. The spectra were recorded at a spectral resolution of 0.03 cm − 1 , room temperature, a path length of 953.6 m and at two pressures of 294 and 523 mbar. The achieved sensitivity (noise equivalent absorption) at the level of k ν =1.38×10 − 10 cm −1 allowed detection of a number of new transitions with the intensity values down to 10 –29 cm/molecule at 296 K. Two bands 60014-00001 and 60015-00001 of 12 C 16 O 2 were detected for the first time. The line positions and intensities of these bands were determined using the Voigt profile as a line shape. The uncertainty of the line position determination was estimated to be about 0.003 cm -1 for the unblended lines with a high value of the signal-to-noise ratio. The uncertainty of the line intensity determination varies from 4% to 40% depending on the strength of the line and the extent of the line overlapping. The measured line intensities of the 60014-00001 and 60015-00001 bands together with those published earlier for the Δ P =15 series of transitions were used to fit the effective dipole moment parameters of this series. Here P =2 V 1 + V 2 +3 V 3 is the polyad number ( V i ( i =1,2,3) are the harmonic oscillators quantum numbers). The fitted parameters reproduce the measured line intensities within their experimental uncertainties. Using the effective Hamiltonian parameters published earlier and the fitted effective dipole moment parameters the line positions and intensities of the 6001 i -00001 ( i =1,2,3,4,5,6,7) bands have been calculated. A comparison of the measured line positions and intensities to those contained in the new version ( huang.seti.org ) AMES line list as well as in the High-T line list are given. [ABSTRACT FROM AUTHOR]

• The 2005 i - 00001 (i = 1,2) absorption bands of 12C16O 2 revisited. • First observation of the 20053 – 00001absorption band of 12C16O 2. • The first measurements of the line intensities of the 2005 i - 00001 (i = 1,2,3) bands of 12C16O 2. • The HITRAN2020 line parameters for the studied bands should be updated. The absorption spectra of carbon dioxide were recorded in the region from 13,500 to 14,200 cm−1, using a Bruker IFS 125 HR Fourier transform spectrometer and a 30 m multipass cell with the White type optical system. The recording was performed at spectral resolution of 0.03–0.04 cm−1, room temperature, path length of 1057.95 m and at three pressures of 252, 403 and 582 mbar. The achieved sensitivity (noise equivalent absorption) at the level of k ν = 6 × 10−10 cm−1 allowed detection of a number of lines of three 2005 i - 00001 (i = 1,2,3) bands of 12C16O 2 with the intensity values down to 10−29 cm−1/(molecule cm−2) at 296 K. The 20053–00001 band was observed for the first time. The line intensities for all bands were measured for the first time. The uncertainty of the line position measurements was estimated to be about 0.007 cm−1 for the unblended lines with a high value of the signal-to-noise ratio. The uncertainties of the retrieved line intensities for the strongest unblended lines are on the level of 10%. The spectroscopic constants for the three observed bands were fitted to the observed line positions. The vibrational transition dipole moments squared of these bands were fitted to the observed line intensities. A comparison of the measured line positions to those from the HITRAN2020 database was done. Finally a comparison of the measured line intensities to those contained in the HITRAN2020 database as well as in the new version of the Ames line list was also given. [ABSTRACT FROM AUTHOR]

• More than 400 new weak absorption lines of H 2 16O are observed. • 40 new energy levels of H 2 16O are derived and 75 levels are corrected. • Significant intensity distortions in the 140–000 and 041–000 bands are found. • Accurate and detailed recommended list of H 2 16O absorption lines is generated. Weak absorption spectrum of water vapor is recorded in the 0.9 µm transparency window using a Fourier transform spectrometer coupled with a 30-m base-length multipass cell. 780 vibration – rotation transitions of the H 2 O molecule were assigned on the base of accurate variational calculations, 410 of them are new. New experimental information is compared with the literature data and spectroscopic data base HITRAN2020. Significant distortions of the intensities of the (041)-(000) and (140)-(000) vibrational bands accepted in HITRAN2020 are discovered from the comparison with the experimental data. An accurate and detailed recommended list of the H 2 16O absorption lines is reported in 9340–9790 cm−1 spectral region based on the experimental energy levels and variational calculation which reproduced the new intensity measurements in the best way. [ABSTRACT FROM AUTHOR]

The water vapor line broadening γ and shift δ coefficients in the ν 1 + ν 2 , ν 2 + ν 3 , ν 1 + ν 3 , 2ν 3 , 2ν 1 , 2ν 2 + ν 3 , and ν 1 + 2ν 2 vibrational bands were obtained from the analysis of the H 2 O–He absorption spectra, recorded in the region from 5000 to 7500 cm −1 with the spectral resolution of 0.01 cm −1 using a Bruker IFS 125HR FTIR spectrometer. The vibrational bands 2ν 3 and ν 1 + 2ν 2 were investigated for the first time. The calculations of γ and δ were performed in the framework of the semi-classical method. The rotational contributions as well as the contributions connected with the accidental resonances were taken into account in the used H 2 O–He interaction potential. The analytical representation of the broadening coefficients γ at planetary temperatures was introduced and discussed. [ABSTRACT FROM AUTHOR]

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

• The CO 2 -broadening and shift parameters of about 2000 ethylene lines in the region of the ν 11 absorption band were measured. • A polynomial approximately describing the rotational dependence of the broadening of ethylene by CO 2 pressure is proposed. • The similarity of the CO 2 -broadening coefficient to those of self-broadening was revealed. The absorption spectra of the mixtures of ethylene and carbon dioxide at seven different partial pressures of both gasses have been recorded using the Bruker IFS 125 HR FTIR spectrometer at room temperature in the 3.3 µm region. The multispectrum fitting procedure has been applied to these spectra to recover the spectral line parameters. The broadening and shift coefficients induced in ethylene by carbon dioxide pressure have been obtained for almost 2000 lines in the region of the ν 11 absorption band between 2928 and 3056 cm−1. The rotational dependence of the broadening parameters was analyzed. The similarity of the CO 2 -broadening coefficient to the self-broadening coefficient was revealed and discussed. [Display omitted] [ABSTRACT FROM AUTHOR]

Abstract: Absorption spectra of carbon dioxide, 12C16O2, have been studied in the three wavenumber ranges (8790–8860, 9340–9650 and 11,430–11,505cm−1) of the near infrared region using spectrophotometric complex of V.E. Zuev Institute of Atmospheric Optics based on an Bruker IFS 125 HR and a 30m multipass cell with the White type optical system. The spectra were recorded at spectral resolution of 0.015cm−1, path length of 613.82m and at pressure range from 209 to 400mbar. The multispectrum fittings with the Voigt profile were performed to retrieve the line positions and intensities of eight bands 5001r−00001 (r=3, 4), 2003r−00001 (r=1,2,3) 2113r−01101 (r=1,2) and 00051−00001. The uncertainty of the line position determination is estimated to be about 0.001cm−1. The absolute accuracy of the line intensity measurement is 5% for 5001r−00001 (r=3,4) bands, 3% for 2003r−00001 (r=1,2,3) bands, 10% for 00051−00001 band and 15% for 2113r−01101 (r=1,2) bands. The measured line intensities were used to fit the effective dipole moment parameters of 12C16O2. The fitted parameters reproduce the measured line intensities within their experimental uncertainties. A comparison of measured positions and intensities with those contained in HITRAN, CDSD, AMES-296, and High-T databases is presented and discussed. [Copyright &y& Elsevier]

[Display omitted] • Measurements of H 2 O absorption spectra perturbed by Xe are performed. • Data on lines broadening and shift coefficients for (1 1 1)-(0 0 0) bands of H 2 O are presented. • A strong influence of the imaginary part of the scattering matrix on the calculated γ and δ was observed. The water vapour line broadening and shifting of 72 lines in the ν 1 + ν 2 + ν 3 vibrational band of H 2 O (in the 8603–8997 cm−1 spectral region) induced by xenon pressure were measured with a Bruker IFS HR FTIR spectrometer. These measurements were performed at room temperature, at a spectral resolution of 0.01 cm−1 and over a wide range of Xe pressure. The broadening and shift coefficients were also calculated using a semi-classical method. The intermolecular potential was taken as the sum of the anisotropic atom–atom potential and the effective vibrationally and rotationally dependent isotropic Lennard–Jones potential. The measured coefficients γ and δ were combined with data from the literature on the ν 2 , ν 1 , ν 3 , 2ν 1 + 2ν 3, 2ν 1 + 2ν 2 + ν 3 , and 3ν 1 + ν 3 bands, and optimal sets of potential parameters were found that gave the best agreement with the measured broadening coefficients. A strong influence of the imaginary part of the scattering matrix on the calculated values of the γ and δ coefficients was observed. The results were compared with those for He-, Ar-, and Kr-broadenings. The measured broadening coefficients were fitted to empirical expressions. The calculated values of the γ and δ coefficients were compared statistically to the measured values. [ABSTRACT FROM AUTHOR]

• Observed line intensities for the 3-0 bands of 12C16O, 13C16O, 12C18O, 12C17O, 13C18O and 13C17O. • Observed line intensities for the hot 4-1 band of 12C16O. • Effective dipole moment parameters for the 3-0 bands of the carbon monoxide isotopologues. • Observed self-broadening coefficients of 12C16O for high values of J (24

• Measurements of H 2 O absorption spectra perturbed by Kr are performed. • Data on lines broadening and shift coefficients for 16 bands of H 2 O are presented. • Calculations of H 2 O line widths and shifts in the framework of the semi-classical method were done. The water vapour line broadening (γ) and shifting (δ) coefficients for 497 lines of 16 vibrational bands ν 1 , ν 3 , 2ν 2 , ν 1 + ν 2 , ν 2 + ν 3 , 3ν 2 , 2ν 2 + ν 3 , ν 1 + 2ν 2 , ν 1 + ν 3 , 2ν 1 , 2ν 3 , 6ν 2 , 2ν 1 + ν 2 ,ν 2 + 2ν 3 , ν 1 + 3ν 2 , and 3ν 2 + ν 3 induced by krypton pressure were measured with Bruker IFS 125 HR Fourier transform spectrometer. The measurements were performed at room temperature, at the spectral resolution of 0.01 cm−1 and in a wide pressure range of Kr (0.303–0.980 atm). The calculations of the broadening and shift coefficients γ and δ were performed in the framework of the semi-classical method. The intermolecular potential was taken as the sum of the anisotropic atom–atom potential and the vibrationally and rotationally dependent isotropic Lennard-Jones potential. The measured coefficients γ and δ were combined with literature data for the ν 2 and rotational bands, and optimal sets of potential parameters that gave the best agreements with the measured broadening coefficients for each vibrational band separately were found. Experimental data for ten vibrational bands of H 2 O perturbed by Kr were used to determine the analytical dependence of some of the potential parameters on the vibrational quantum numbers. Combined experimental data for the coefficients γ of 19 vibrational bands of H 2 O perturbed by Kr were fitted to the empirical function. The computed coefficients γ and δ derived from the semi-classical method and the fitted parameters were compared statistically to the measurements. The vibrational dependence of the potential as well as of the coefficients γ and δ is discussed. [ABSTRACT FROM AUTHOR]

• Observed line intensities for the 4–0 band of 12C16O, 13C16O and 12C18O. • Effective dipole moment parameters for the 4–0 band of all carbon monoxide isotopologues. • Calculated line intensities for the 4–0 band of all carbon monoxide isotopologues. • Self-pressure induced broadening coefficients for the 4–0 band of 12C16O. The absorption spectra of carbon monoxide have been recorded in the 8150–8466 cm−1 wavenumber regions using the IFS 125 HR Fourier transform spectrometer and a 30 m multipass cell with the White-type optical system. The spectra were recorded at spectral resolution of 0.012–0.014 cm−1, path length up to 1058 m, and at pressure range from 196 to 492 mbar. The temperature of the recordings was about 302 K. The lines of the 4–0 band of three isotopologues 12C16O, 13C16O and 12C18O were assigned. The effective dipole moment parameters describing the line intensities of the 4–0 band of 12C16O were fitted to the observed values of the line intensities. Then using the isotopic substitution equations they were recalculated to those of the minor isotopologues including the radioactive ones. The accuracy of the line intensity measurements varies between 2% and 3% for the strong unblended lines. The comparison of our measured line intensities to those of other authors and to HITRAN2016 database is given. [ABSTRACT FROM AUTHOR]

• Measurements of H 2 O absorption spectra perturbed by Kr are performed. • Data on lines broadening and shift coefficients for ν 1 + ν 2 + ν 3 band of H 2 O are presented. • Calculations of H 2 O line widths and shifts in the framework of the semi-classical method were done. The water vapor line broadening and shifting for 96 lines in the ν 1 + ν 2 + ν 3 vibrational band (8600–9070 cm−1 spectral range) induced by krypton pressure were measured with Bruker IFS HR FTIR spectrometer. The measurements were performed at room temperature, at the spectral resolution of 0.01 cm−1 and in a wide pressure range of Kr. The calculations of the broadening coefficients γ and δ were performed in the framework of the semi-classical method. The intermolecular potential was taken as the sum of the anisotropic atom-atom potential and vibrationally and rotationally dependent isotropic Lennard-Jones potential. The measured line-width coefficients γ were fitted to the empirical functions. The coefficients γ and δ calculated in the semi-classical method and using the empirical functions were compared statistically to measurements. [ABSTRACT FROM AUTHOR]

Highlights • Fourier transform spectroscopy of a mixture of CO with CO 2 in the 2000–2300 cm−1 region. • A spectra analysis was made using Speed dependent Voigt profile. • The CO 2 broadening and shift coefficients for 49 lines of the CO molecule were obtained. Abstract The absorption spectra of a mixture of CO with CO 2 at different partial pressures of CO 2 have been recorded at room temperature in the 2000–2300 cm−1 region using a Bruker IFS 125 HR FTIR spectrometer. To obtain the spectral line parameters for the fundamental band of CO molecule, the quadratic speed-dependent Voigt profile was used for the first time. The CO 2 pressure induced broadening and shift coefficients for 49 spectral lines have been measured. A comparison with the published data is discussed. [ABSTRACT FROM AUTHOR]

The absorption spectra of the mixture of C 2 H 2 and CO 2 at different partial pressures of both gases have been recorded at room temperature in the 3 µm region using the Bruker IFS 125 HR FTIR spectrometer. The multispectrum fitting procedure has been applied to these spectra to recover the broadening and shift parameters of the acetylene spectral lines. The CO 2 broadening and pressure induced shift coefficients for 119 lines of the ν 3 and ν 2 + ( ν 4 + ν 5 ) + 0 bands of acetylene have been derived. The rotational dependence of the values of these coefficients is discussed. The comparison of the obtained coefficients to those published by other authors for the ν 1  + ν 3 and ( ν 4 + ν 5 ) + 0 bands is performed. [ABSTRACT FROM AUTHOR]

The absorption spectra of a mixture of H 2 O with CO 2 at different partial pressures of CO 2 have been recorded at room temperature in the 10,100–10,800 cm −1 region using a Bruker IFS 125 HR FTIR spectrometer. The multispectrum fitting procedure has been applied to these spectra to recover the broadening and shift parameters of the water vapor spectral lines. To obtain the spectral lines parameters two models of the line shape were used: the Voigt profile and the quadratic speed-dependent Voigt profile. The CO 2 pressure induced broadening and shift coefficients for 168 spectral lines with rather large values of the signal to noise ratio have been measured. [ABSTRACT FROM AUTHOR]

• The H2O absorption spectra induced by CO2 pressure in the 16,760–7430 cm–1 region. • The CO 2 -broadening and shift coefficients of about 250 H 2 O lines were obtained. • A spectra analysis was made using quadratic speed-dependent Voigt profile. The absorption spectra of the mixtures of water vapor and carbon dioxide at five different partial pressures of both gasses have been recorded using the Bruker IFS 125 HR FTIR spectrometer at room temperature in the 6760–7430 cm–1 spectral region. The multispectrum fitting procedure has been applied to these spectra to recover the spectral line parameters. To obtain the spectral lines parameters the quadratic speed-dependent Voigt profile was used. The water vapor line broadening and shift coefficients for lines of three vibrational bands ν 1 +ν 3 , 2ν 2 +ν 3 , and 2ν 1 were obtained. [Display omitted] [ABSTRACT FROM AUTHOR]

A description of the spectroscopic complex at V.E. Zuev Institute of Atmospheric Optics, SB RAS, operating in a wide spectral range with high threshold sensitivity to the absorption coefficient is presented. Measurements of weak lines and nonselective spectra of CO 2 and H 2 O were performed based on the built setup. As new application of this setup, positions and intensities of 152 weak lines of H 2 O were measured between 2400 and 2560 cm −1 with threshold sensitivity of 8.6×10 −10 cm −1 , and compared with available calculated and experimental data. Essential deviations between the new intensity measurements and calculated data accepted in HITRAN 2012 and GEISA 2015 forthcoming release are found. [ABSTRACT FROM AUTHOR]

• Fourier transform spectrum with high absorption path length. • Missing Q -branch of ν 1 +ν 3 +3ν 4 band of 12C 2 H 2 in databases. • Line list for databases. The Q -branch of the ν 1 +ν 3 +3ν 4 cold band of 12C 2 H 2 located at 8330 cm−1 has been observed under one kilometer absorption path length. The analysis leads to a line list for this isolated and strong Q -branch that is missing from spectroscopic databases. This work completes the large update of acetylene data in the Δ P = 13 spectral region (8200 and 8900 cm−1) made in spectroscopic databases (HITRAN and GEISA) in 2020 edition. [Display omitted] [ABSTRACT FROM AUTHOR]

• For the first time the 1-0 and 3-0 bands of CO confined in aerogel were recorded. • The of rotational dependencies for 1-0, 2-0, 3-0 bands of confined CO are identical. • The influence of vibrational excitation on HWHM values of CO is insignificant. The absorption spectra of carbon monoxide confined in aerogel were recorded using Bruker IFS 125HR Fourier transform spectrometer within 2000–6500 cm−1 spectral range. The influence of degree of vibrational excitation on the line half-width for 1-0, 2-0 and 3-0 bands of CO confined in the same aerogel sample was studied for the first time. It was found that the character of obtained rotational dependencies is identical for all three bands and vibrational excitation insignificantly affects line HWHM. [ABSTRACT FROM AUTHOR]

Highlights • CO 2 -broadening and shift coefficients of the sulfur dioxide in the 4 µm region. • Measured CO 2 -broadening coefficients for SO 2 are smaller than those from HITRAN2016. • Mean value of the CO 2 -shift coefficients for SO 2 in the 4 µm region is −0.0027 cm−1 atm−1. Abstract The absorption spectra of the mixture of SO 2 and CO 2 at different partial pressures of both gases have been recorded at room temperature in the 4 µm region using the Bruker IFS 125 HR FTIR spectrometer. The multispectrum fitting procedure has been applied to these spectra to recover the CO 2 -broadening and shift parameters of the sulfur dioxide spectral lines. The CO 2 broadening and the pressure induced shift coefficients for 1422 and 116 lines of the ν 1 + ν 3 A -type band of 32S16O 2 and 34S16O 2 , respectively, have been derived. Beside, these coefficients have been derived for 254 lines of the ν 1 + ν 2 + ν 3 − ν 2 hot band of 32S16O 2. The rotational dependence of the values of these coefficients is discussed. The CO 2 pressure induced shift coefficients for this molecule are published for the first time. The comparison of the obtained broadening coefficients to those published by other authors for one pure rotational line and for the lines of the ν 1 B -type band is given. [ABSTRACT FROM AUTHOR]

Absorption spectra of carbon oxide, confined in nanoporous silica aerogel, have been measured within 4100–4400 cm −1 region at room temperature and at several pressures using Bruker IFS-125 HR Fourier spectrometer. Dependence of the half-width (HWHM) values on rotational quantum numbers is studied and compared with the data available in literature. It is found that variations in the half-width values for the confined CO at small quantum numbers are larger than at moderate ones. The influence of confinement tightness on rotational dependence is discussed. [ABSTRACT FROM AUTHOR]

Abstract: Ethylene (ethene, H2C=CH2) is a naturally occurring compound in ambient air that affects atmospheric chemistry and global climate. The C2H4 spectrum is available in databases only for the 1000 and 3000cm−1 ranges. In this work, the ethylene absorption spectrum was measured in the 6030–6250cm−1 range with the use of a high resolution Bruker IFS 125HR Fourier-spectrometer and a two-channel opto-acoustic spectrometer with a diode laser. As a secondary standard of wavelengths, the methane absorption spectrum was used in both cases. A preliminary analysis was realized thanks to the tensorial formalism developed by the Dijon group that is implemented in the XTDS software package . We considered the two combination bands and as an interacting dyad. Parameters for the dyad were fitted simultaneously from a re-analysis of previously recorded supersonic expansion jet FTIR data, while parameters for the v 5=1 Raman level were taken from literature. More than 600 lines could be assigned in the 6030–6250cm−1 region (and also 682 in the 2950–3150cm−1 region) and effective Hamiltonian parameters were fitted, including Coriolis interaction parameters. The dyad features are globally quite well reproduced, even if there are still problems at high J values. [ABSTRACT FROM AUTHOR]