Dual-broadband rotational CARS modelling of nitrogen at pressures up to 9 MPa. II. Rotational Raman line widths

Mikael Afzelius, Per-Erik Bengtsson, J Bood, J Bonamy, F Chaussard, H Berger, T Dreier

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25 Citations (Scopus)

Abstract

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.
Original languageEnglish
Pages (from-to)771-778
JournalApplied Physics B
Volume75
Issue number6-7
DOIs
Publication statusPublished - 2002

Subject classification (UKÄ)

  • Atom and Molecular Physics and Optics

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