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arXiv · 1404.6482

Rayleigh-Brillouin scattering of carbon dioxide

Ziyu Gu·Wim Ubachs·Willem van de Water
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Abstract

The spectral lineshape of spontaneous Rayleigh-Brillouin scattering in CO2 is studied in a range of pressures. The spectrum is influenced by the bulk viscosity, which is a relaxation phenomenon involving the internal degrees of freedom of the molecule. The associated relaxation rates can be compared to the frequency shift of the scattered light, which demands precise measurements of the spectral lineshape. We find the value of the bulk viscosity around 5.7 X 10^{-6} kg/(ms) for the range of pressures p= 2-4 bar and for conditions of room temperature.

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Ziyu Gu, Wim Ubachs, Willem van de Water. 2014-04-25. Rayleigh-Brillouin scattering of carbon dioxide. https://doi.org/10.1364/ol.39.003301

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