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Michele Marrocco Effect of vibration–rotation coupling on simultaneous extraction of temperature and species concentration from vibrational CARS spectra of hot gases Journal of Raman Spectroscopy 44

Version of Record online: 7 AUG 2013 | DOI: 10.1002/jrs.4357

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The coupling between vibration and rotation in light molecules changes the strength of the coherent anti-Stokes Raman scattering in comparison to the conventional rigid-rotor approximation. The results show that small changes of the fitted temperature correspond to larger deviations for the determination of concentrations and non-resonant background. An example is the figure where the plot of the sum of squared differences indicates significant deviations for the physical parameters when the reference temperature is 2300 K.

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