1. Dual-broadband rotational CARS modelling of nitrogen at pressures up to 9 MPa. II. Rotational Raman line widths
- Author
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Hubert Berger, Thomas Dreier, Frédéric Chaussard, Jeanine Bonamy, Per-Erik Bengtsson, Joakim Bood, Mikael Afzelius, Department of Combustion Physics, Lund Institute of Technology, Lund University [Lund]-Lund University [Lund], Combustion Research Facility, Sandia National Laboratories - Corporation, Laboratoire de Physique Moléculaire (UMR 6624) (LPM), Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique de l'Université de Bourgogne (LPUB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Institut fûr Verbrennung, Universität Stuttgart [Stuttgart], Laboratoire de Physique Moléculaire ( LPM ), Centre National de la Recherche Scientifique ( CNRS ) -Université de Franche-Comté ( UFC ), Laboratoire de Physique de l'Université de Bourgogne ( LPUB ), and Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS )
- Subjects
Materials science ,Physics and Astronomy (miscellaneous) ,General Physics and Astronomy ,Rotational transition ,chemistry.chemical_element ,02 engineering and technology ,01 natural sciences ,Molecular physics ,Q-BRANCH ,010309 optics ,Raman line ,symbols.namesake ,Nuclear magnetic resonance ,Maschinenbau ,0103 physical sciences ,Broadband ,SCATTERING THERMOMETRY ,SPECTRA ,Quantum optics ,[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] ,[ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics] ,Atmospheric pressure ,RANGE ,General Engineering ,021001 nanoscience & nanotechnology ,Nitrogen ,Diatomic molecule ,SPECTROSCOPY CARS ,N-2 ,CO ,chemistry ,symbols ,HIGH-TEMPERATURE ,LINEWIDTHS ,0210 nano-technology ,Raman spectroscopy ,COEFFICIENTS - Abstract
International audience; Rotational coherent anti-Stokes Raman spectroscopy (CARS) is a well-established spectroscopic technique for thermometry at pre-combustion temperatures an atmospheric pressure. However, at pressures of several MPa, a previous investigation revealed large discrepancies between experimental data and the theoretical model. A re-evaluation has been made of these data (at room temperature and in the range 1.5-9 MPa) with two improvements to the spectral code. The first is the inclusion of an inter-branch interference effect, which is described in detail in Paper I. The second is the use of experimental S-1-branch Raman line widths measured at 295 K, with a temperature dependence extracted from semi-classical calculations following the Robert-Bonamy formalism. It is shown that these two modifications significantly improve the theoretical model, since both the spectral fits and the accuracy of the evaluated temperatures are considerably improved.
- Published
- 2002
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