Papers by Semen Mikhailenko
Journal of Quantitative Spectroscopy and Radiative Transfer, 2007
Journal of Quantitative Spectroscopy and Radiative Transfer, 2015
ABSTRACT The absorption spectrum of water vapor in “natural” isotopic abundance has been recorded... more ABSTRACT The absorption spectrum of water vapor in “natural” isotopic abundance has been recorded at room temperature by high sensitivity Continuous Wave Cavity Ring Down Spectroscopy (CW-CRDS) between 7911 and 8337 cm−1. The investigated region covers most of the 1.25 µm transparency window of importance for atmospheric applications. The recordings were performed with sensitivity on the order of αmin~2×10-11 cm−1, more than two orders of magnitude better than previous investigations by Fourier Transform Spectroscopy (FTS). Measured line intensities cover a range of seven orders of magnitude (3×10-30-2×10-23 cm/molecule at room temperature). The experimental line list provided as Supplementary Material includes more than 5000 transitions. As a result of the achieved sensitivity, more than 1150 lines of the experimental list were identified as being due to ammonia present as an impurity at the 5 ppm concentration level in the water sample. Although incomplete, the obtained ammonia line list seems to be the first one in the region. More than 3193 water lines were assigned to 3560 transitions of five water isotopologues (H216O, H218O, H217O, HD16O and HD18O). The assignments were performed using known experimental energy levels and calculated spectra based on variational calculations by Schwenke and Partridge. The obtained results are compared to the most relevant previous studies by Fourier Transform Spectroscopy in the region and to the exhaustive review of rovibrational line positions and levels performed recently by an IUPAC sponsored task group. 266 levels are newly determined and 46 are corrected by more than 0.015 cm−1 compared to those recommended by the water IUPAC task group. The overall agreement between variational and measured intensities is satisfactory.
A study of high-resolution (0.006 cm[sup [minus]1]) Fourier transform absorption spectra of [sup ... more A study of high-resolution (0.006 cm[sup [minus]1]) Fourier transform absorption spectra of [sup 16]O[sub 3] around 3,450 cm[sup [minus]1] has been performed, leading to the first analysis of the [nu][sub 1] + 2[nu][sub 2] + [nu][sub 3] and 2[nu][sub 2] + 2[nu][sub 3] bands of this molecule. To increase the absorption strength of these very weak bands a White cell with path lengths of up to 36 m and pressures from 40 to 55 Torr was used. The rotational energy levels of the (121) and (022) vibrational states deduced from observed spectra have been satisfactorily reproduced using a Hamiltonian matrix which takes explicitly into account the Coriolis interaction between (121) [leftrightarrow] (022) and (121) [leftrightarrow] (220) and Darling-Dennison interaction between (022) [leftrightarrow] (220). Furthermore about 60 and 20 line intensities, respectively, for the (121) and (022) bands were measured with an accuracy of about 6 and 12%, leading to the determination of the [nu][sub 1] + 2[nu][sub 2] + [nu][sub 3] and 2[nu][sub 2] + 2[nu][sub 3] vibrational transition moments. Finally, a complete list of line positions, intensities, and lower state energies for both bands has been generated.
Journal of Molecular Spectroscopy
The very weak bands nu1 + 2nu2 + 3nu3 and 4nu1 + nu3 of 16O3 have been observed for the first tim... more The very weak bands nu1 + 2nu2 + 3nu3 and 4nu1 + nu3 of 16O3 have been observed for the first time, using the Fourier transform spectrometer (FTS) of Reims and the usual experimental setup providing a large product p x l of approximately 38 Torr x 36 m. The upper levels of these A-type bands which are rather close in energy (they appear respectively at 5291.722 and 5307.790 cm-1) belong to two different sets of interacting polyads. To correctly reproduce the rotation-vibration energy levels and account for the observed perturbations, both bands are treated in a dyad approximation: the (123) state in the Coriolis resonance with the (330) state, and the (401) state in the Coriolis resonance with the (024) state. The assignments of the rotation-vibration levels of the (123) state are confirmed by measurements of line positions of the hot band nu1 + 2nu2 + 3nu3 - nu2 which has also been observed for the first time. The fits are very satisfactory: the r.m.s. deviation for 249 energy levels of the (123) state is 2.4 x 10(-3) cm-1 and is 2.0 x 10(-3) cm-1 for 266 levels of the (401) state. These r.m.s. are near experimental accuracy. Transition moments for the three observed bands are determined from measured line intensities. Copyright 1997 Academic Press. Copyright 1997Academic Press
Journal of Molecular Spectroscopy
The 2nu1 + nu2 + 2nu3 band of ozone, occurring in the 4780 cm-1 region, has been observed for the... more The 2nu1 + nu2 + 2nu3 band of ozone, occurring in the 4780 cm-1 region, has been observed for the first time, using a Fourier transform spectrometer, at 0.008 cm-1 resolution and using a large path length pressure product. Assignments of vibration-rotational transitions have been made up to J = 48 and Ka = 9. As a few levels with Ka = 1 or 2 are perturbed, it has been necessary to take into account the Coriolis resonance between the (212) and (141) vibrational states. With the effective Hamiltonian explicitly accounting for the interaction between these two states, the fit on 165 energy levels leads to the rms deviation of 1.9 x 10(-3) cm-1, which is near the experimental accuracy. Line intensities of the 2nu1 + nu2 + 2nu3 band have been measured and calculated. The set of spectroscopic parameters for interacting bands, as well as transition moment constants, is given. A complete list of line positions and intensities, with a cutoff of 1 x 10(-26) cm-1/molecule.cm-2 at 296 K up to J = 65 and Ka = 15, has been generated, which leads to the integrated band intensity Sv (2nu1 + nu2 + 2nu3) = (5.1 +/- 2.0) x 10(-23) cm-1/molecule.cm-2. Copyright 1997Academic Press
Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy
The absorption spectrum of water vapor has been investigated by Intracavity Laser Spectroscopy (I... more The absorption spectrum of water vapor has been investigated by Intracavity Laser Spectroscopy (ICLAS) between 13540 and 14070 cm-1. This spectrum is dominated by relatively strong transitions of the 4 polyad of vibrational states. The achieved sensitivity – on the order of min~10-9 cm-1 – has allowed one to newly measure 222 very weak transitions with intensities down to 5×10-28 cm/molecule at 296 K. 50 new or corrected H2 16O energy levels belonging to a total of 13 vibrational states could be determined from the rovibrational analysis based on variational calculations by Schwenke and Partridge. The previous investigations in the region by Fourier Transform Spectroscopy were critically evaluated and used to construct the best to date set of energy levels accessed by transitions in the considered region. All the rovibrational transitions reaching these upper energy levels and having intensities larger than 4.0×10-28 cm/mol were calculated. In the resulting line list, the position...
This study is the continuation of our analysis of emission spectra of pure D20. The spectra have ... more This study is the continuation of our analysis of emission spectra of pure D20. The spectra have been recorded in the 320 - 860 and 1750 - 4300 cm-1 spectral regions at different pressures and temperatures. The measurements were performed in an alumina cell with an effective length of hot gas of about 50 cm. All spectra have been recorded
Fourier transform spectra of water vapor have been recorded in the range 2500 - 4500 cm-1. This s... more Fourier transform spectra of water vapor have been recorded in the range 2500 - 4500 cm-1. This spectral range is important for accurate modeling of radiative transfer phenomena in the Earth's atmosphere and in other planetary atmospheres, and is frequently used for atmospheric remote sensing applications. The measurements were performed with the combination of a 4 m base length White-type
Journal of Quantitative Spectroscopy and Radiative Transfer
The updated methane spectral line list GOSAT-2014 for the 5550–6240 cm−1 region with the intensit... more The updated methane spectral line list GOSAT-2014 for the 5550–6240 cm−1 region with the intensity cutoff of 5×10–25 cm/molecule at 296 K is presented. The line list is based on the extensive measurements of the methane spectral line parameters performed at different temperatures and pressures of methane without and with buffer gases N2, O2 and air. It contains the following spectral line parameters of about 12150 transitions: line position, line intensity, energy of lower state, air-induced and self-pressure-induced broadening and shift coefficients and temperature exponent of air-broadening coefficient. The accuracy of the line positions and intensities are considerably improved in comparison with the previous version GOSAT-2009. The improvement of the line list is done mainly due to the involving to the line position and intensity retrieval of six new spectra recorded with short path way (8.75 cm). The air-broadening and air-shift coefficients for the J-manifolds of the 2ν3(F2) b...
Journal of molecular spectroscopy, 1996
Using a Fourier transform spectrometer, we have recorded the spectra of ozone in the region of 46... more Using a Fourier transform spectrometer, we have recorded the spectra of ozone in the region of 4600 cm-1, with a resolution of 0.008 cm-1. The strongest absorption in this region is due to the nu1 + nu2 + 3nu3 band which is in Coriolis interaction with the nu2 + 4nu3 band. We have been able to assign more than 1700 transitions for these two bands. To correctly reproduce the calculation of energy levels, it has been necessary to introduce the (320) state which strongly perturbs the (113) and (014) states through Coriolis- and Fermi-type resonances. Seventy transitions of the 3nu1 + 2nu2 band have also been observed. The final fit on 926 energy levels with Jmax = 50 and Kmax = 16 gives rms = 3.1 x 10(-3) cm-1 and provides a satisfactory agreement of calculated and observed upper levels for most of the transitions. The following values for band centers are derived: nu0(nu1 + nu2 + 3nu3) = 4658.950 cm-1, nu0(3nu1 + 2nu2) = 4643.821 cm-1, and nu0(nu2 + 4nu3) = 4632.888 cm-1. Line intensi...
Journal of Molecular Spectroscopy
The infrared spectra of 16 O 3 have been recorded in the 3700 cm -1 region, with a Fourier transf... more The infrared spectra of 16 O 3 have been recorded in the 3700 cm -1 region, with a Fourier transform spectrometer at 0.008 cm -1 resolution. A White-type cell, $ \ell $ = 32.16 m, filled with 42.8 Torr O 3 was used. This spectral region corresponds to the nu 2 + 3nu 3 and nu 1 + nu 2 + 2nu 3 bands. The nu 2 + 3nu 3 band was observed and analyzed previously, but the interacting band nu 1 + nu 2 + 2nu 3 is observed for the first time. The assignments of this band cover the range J = 58, K a = 12; observations up to K a = 17 are available for nu 2 + 3nu 3 . The two states (013) and (112) are satisfactorily treated as a dyad, with a standard deviation of 1.5 x 10 -3 cm -1 for the 861 observed energy levels.
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 1998
ABSTRACT
Journal of Quantitative Spectroscopy and Radiative Transfer, 2014
ABSTRACT Spectroscopy and Molecular Properties of Ozone (“S&MPO”) is an Internet accessib... more ABSTRACT Spectroscopy and Molecular Properties of Ozone (“S&MPO”) is an Internet accessible information system devoted to high resolution spectroscopy of the ozone molecule, related properties and data sources. S&MPO contains information on original spectroscopic data (line positions, line intensities, energies, transition moments, spectroscopic parameters) recovered from comprehensive analyses and modeling of experimental spectra as well as associated software for data representation written in PHP Java Script, C++ and FORTRAN. The line-by-line list of vibration–rotation transitions and other information is organized as a relational database under control of MySQL database tools. The main S&MPO goal is to provide access to all available information on vibration–rotation molecular states and transitions under extended conditions based on extrapolations of laboratory measurements using validated theoretical models. Applications for the S&MPO may include: education/training in molecular physics, radiative processes, laser physics; spectroscopic applications (analysis, Fourier transform spectroscopy, atmospheric optics, optical standards, spectroscopic atlases); applications to environment studies and atmospheric physics (remote sensing); data supply for specific databases; and to photochemistry (laser excitation, multiphoton processes). The system is accessible via Internet on two sites: http://smpo.iao.ru and http://smpo.univ-reims.fr.
Journal of Quantitative Spectroscopy and Radiative Transfer, 2010
A methane spectral line list for the 5550-6236 cm À 1 range with the intensity cut off 4 Â 10 À 2... more A methane spectral line list for the 5550-6236 cm À 1 range with the intensity cut off 4 Â 10 À 26 cm/molecule at 296 K is presented. The line list is based on new extensive measurements of methane spectral line parameters performed at different temperatures and pressures of methane and buffer gases N 2 ,O 2 and air. This spectral line list is prepared in HITRAN-2008 format and contains the following spectral line parameters of about 11,000 lines: position, intensity, energy for lower state (where possible), air-broadening and air-shifting coefficients, exponent of temperature dependence of air-broadening coefficient and self-broadening coefficient.
Journal of Quantitative Spectroscopy and Radiative Transfer, 2005
The content of the current (2003) version, GEISA/IASI-03, of the computer-accessible spectroscopi... more The content of the current (2003) version, GEISA/IASI-03, of the computer-accessible spectroscopic database, GEISA/IASI, is described. This system or database is comprised of three independent spectroscopic archives, which are (a) a database of individual spectral line parameters on ...
Journal of Quantitative Spectroscopy and Radiative Transfer, 2014
An empirical line list has been constructed for "natural" water vapor at 296 K in the 5850-7920 c... more An empirical line list has been constructed for "natural" water vapor at 296 K in the 5850-7920 cm À 1 region. It was obtained by gathering separate line lists recently published on the basis of spectra recorded by high sensitivity Continuous Wave Cavity Ring Down Spectroscopy (CW-CRDS) of natural water, complemented with literature data for the strongest lines. The list includes 38,318 transitions of four major water isotopologues (H 2 16 O, H 2 18 O, H 2 17
Journal of Quantitative Spectroscopy and Radiative Transfer, 1999
The current version GEISA-97 of the computer-accessible database system GEISA (Gestion et Etude d... more The current version GEISA-97 of the computer-accessible database system GEISA (Gestion et Etude des Informations Spectroscopiques Atmosphe´riques: Management and Study of Atmospheric Spectroscopic Information) is described. This catalogue contains 1,346,266 entries. These are spectroscopic parameters required to describe adequately the individual spectral lines belonging to 42 molecules (96 isotopic species) and located between 0 and 22,656 cm\. The featured molecules are of interest in studies of the terrestrial as well as the other planetary atmospheres, especially those of the Giant Planets. GEISA-97 contains also a catalog of absorption cross-sections of molecules such as chlorofluorocarbons which exhibit unresolvable spectra. The modifications and improvements made to the earlier edition (GEISA-92) and the data management software are described. GEISA-97 and the associated management software are accessible from the ARA/LMD (Laboratoire de Me´te´orologie Dynamique du CNRS, France) web site: http://ara01.polytechnique.fr/registration.
Journal of Quantitative Spectroscopy and Radiative Transfer, 1998
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Papers by Semen Mikhailenko