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Updated: Apr 28, 2026

Preparation of Extracellular Matrix Protein Fibers for Brillouin Spectroscopy
Published on: September 15, 2016
Rayleigh-Brillouin scattering of carbon dioxide
Abstract:
The spectral line shape of spontaneous Rayleigh-Brillouin scattering in CO2 is studied in a range of pressures. The spectrum is influenced by the bulk viscosity η(b), 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 line shape. We find η(b)=(5.7±0.6)×10(-6) kg m(-1) s(-1) for the range of pressures p=2-4 bar and for room temperature conditions.
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