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Linewidth modelling of C2H2-N-2 mixtures tested by rotational CARS measurements

Buldyreva, J ; Bonamy, J ; Weikl, MC ; Beyrau, F ; Seeger, T ; Leipertz, A ; Vestin, Fredrik LU ; Afzelius, Mikael LU ; Bood, Joakim LU and Bengtsson, Per-Erik LU orcid (2006) In Journal of Raman Spectroscopy 37(6). p.647-654
Abstract
The acetylene-nitrogen system is investigated in a combined theoretical and experimental effort in view of its thermometry applications. Accurate values of the rotational Raman linewidths of acetylene are of crucial importance for the computation of spectra from rotational coherent anti-Stokes Raman scattering (CARS) used for temperature and concentration evaluations. Since the direct measurements of these linewidths are not available, they are rigorously calculated by a semi-classical Robert-Bonamy formalism employing exact trajectories. The computed linewidths are used as input parameters in the theoretical spectra simulation, which is also improved by the inclusion of an interbranch interference with coherent Stokes Raman scattering... (More)
The acetylene-nitrogen system is investigated in a combined theoretical and experimental effort in view of its thermometry applications. Accurate values of the rotational Raman linewidths of acetylene are of crucial importance for the computation of spectra from rotational coherent anti-Stokes Raman scattering (CARS) used for temperature and concentration evaluations. Since the direct measurements of these linewidths are not available, they are rigorously calculated by a semi-classical Robert-Bonamy formalism employing exact trajectories. The computed linewidths are used as input parameters in the theoretical spectra simulation, which is also improved by the inclusion of an interbranch interference with coherent Stokes Raman scattering (CSRS). These theoretical spectra are used to evaluate the temperature from experimental CARS spectra of acetylene-nitrogen mixtures recorded in the pressure range 0.1-0.6 MPa. The new linewidths (NLWs) and the CSRS interference inclusion result in a clear improvement of spectral fitting as well as in reasonable values of evaluated temperatures. Copyright (c) 2006 John Wiley & Sons, Ltd. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
semi-classical computation, collisional linewidth, interbranch interference, evaluation, temperature, acetylene-nitrogen mixture, rotational CARS thermometry
in
Journal of Raman Spectroscopy
volume
37
issue
6
pages
647 - 654
publisher
John Wiley and Sons
external identifiers
  • wos:000238717500005
  • scopus:33745567556
ISSN
1097-4555
DOI
10.1002/jrs.1491
language
English
LU publication?
yes
id
9dbfc843-d935-4e6d-8936-673d781fd559 (old id 404463)
date added to LUP
2016-04-01 16:09:16
date last changed
2021-06-16 02:38:08
@article{9dbfc843-d935-4e6d-8936-673d781fd559,
  abstract     = {The acetylene-nitrogen system is investigated in a combined theoretical and experimental effort in view of its thermometry applications. Accurate values of the rotational Raman linewidths of acetylene are of crucial importance for the computation of spectra from rotational coherent anti-Stokes Raman scattering (CARS) used for temperature and concentration evaluations. Since the direct measurements of these linewidths are not available, they are rigorously calculated by a semi-classical Robert-Bonamy formalism employing exact trajectories. The computed linewidths are used as input parameters in the theoretical spectra simulation, which is also improved by the inclusion of an interbranch interference with coherent Stokes Raman scattering (CSRS). These theoretical spectra are used to evaluate the temperature from experimental CARS spectra of acetylene-nitrogen mixtures recorded in the pressure range 0.1-0.6 MPa. The new linewidths (NLWs) and the CSRS interference inclusion result in a clear improvement of spectral fitting as well as in reasonable values of evaluated temperatures. Copyright (c) 2006 John Wiley & Sons, Ltd.},
  author       = {Buldyreva, J and Bonamy, J and Weikl, MC and Beyrau, F and Seeger, T and Leipertz, A and Vestin, Fredrik and Afzelius, Mikael and Bood, Joakim and Bengtsson, Per-Erik},
  issn         = {1097-4555},
  language     = {eng},
  number       = {6},
  pages        = {647--654},
  publisher    = {John Wiley and Sons},
  series       = {Journal of Raman Spectroscopy},
  title        = {Linewidth modelling of C2H2-N-2 mixtures tested by rotational CARS measurements},
  url          = {http://dx.doi.org/10.1002/jrs.1491},
  doi          = {10.1002/jrs.1491},
  volume       = {37},
  year         = {2006},
}