Vieitez, Maria Ofelia and van Duijn, Eric-Jan and Ubachs, Wim and Witschas, Benjamin and Meijer, Afric and de Wijn, Astrid and Dam, Nico and van de Water, Willem (2010) Coherent and spontaneous Rayleigh-Brillouin scattering in atomic and molecular gases and gas mixtures. Physical Review A - Atomic, Molecular, and Optical Physics, 82 (043836), pp. 1-14. American Physical Society. doi: 10.1103/PhysRevA.82.043836.
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Official URL: http://pra.aps.org/pdf/PRA/v82/i4/e043836
Abstract
We study Rayleigh-Brillouin scattering in gases of N2, O2, and SF6 molecules, Kr atoms, and He-Xe and He-CO2 mixtures at pressures ranging from 1 to 3 bar and using two different experimental setups. In one setup, we measure spectra of light scattered by thermal density fluctuations (spontaneous Rayleigh-Brillouin scattering); in the second setup density waves are induced in the overlap region of two counterpropagating laser beams (coherent Rayleigh-Brillouin scattering).We compare measured spectra to the Tenti models and to a recent model for mixtures. We find new values of the bulk viscosity, which is a parameter in line-shape models that allows for internal degrees of freedom. Both experiments agree on the value of the bulk viscosity. Our results indicate a need for new line-shape models for mixtures of molecules with internal degrees of freedom.
Item URL in elib: | https://elib.dlr.de/65908/ | ||||||||||||||||||||||||||||||||||||
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Document Type: | Article | ||||||||||||||||||||||||||||||||||||
Title: | Coherent and spontaneous Rayleigh-Brillouin scattering in atomic and molecular gases and gas mixtures | ||||||||||||||||||||||||||||||||||||
Authors: |
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Date: | 25 October 2010 | ||||||||||||||||||||||||||||||||||||
Journal or Publication Title: | Physical Review A - Atomic, Molecular, and Optical Physics | ||||||||||||||||||||||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||||||||||||||||||||||
Open Access: | Yes | ||||||||||||||||||||||||||||||||||||
Gold Open Access: | No | ||||||||||||||||||||||||||||||||||||
In SCOPUS: | Yes | ||||||||||||||||||||||||||||||||||||
In ISI Web of Science: | No | ||||||||||||||||||||||||||||||||||||
Volume: | 82 | ||||||||||||||||||||||||||||||||||||
DOI: | 10.1103/PhysRevA.82.043836 | ||||||||||||||||||||||||||||||||||||
Page Range: | pp. 1-14 | ||||||||||||||||||||||||||||||||||||
Publisher: | American Physical Society | ||||||||||||||||||||||||||||||||||||
Status: | Published | ||||||||||||||||||||||||||||||||||||
Keywords: | Rayleigh-Brillouin scattering, spectroscopy, Lidar, gas mixtures, bulk viscosity. | ||||||||||||||||||||||||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport (old) | ||||||||||||||||||||||||||||||||||||
HGF - Program: | Space (old) | ||||||||||||||||||||||||||||||||||||
HGF - Program Themes: | W EO - Erdbeobachtung | ||||||||||||||||||||||||||||||||||||
DLR - Research area: | Space | ||||||||||||||||||||||||||||||||||||
DLR - Program: | W EO - Erdbeobachtung | ||||||||||||||||||||||||||||||||||||
DLR - Research theme (Project): | W - Vorhaben ADM (old) | ||||||||||||||||||||||||||||||||||||
Location: | Oberpfaffenhofen | ||||||||||||||||||||||||||||||||||||
Institutes and Institutions: | Institute of Atmospheric Physics > Lidar | ||||||||||||||||||||||||||||||||||||
Deposited By: | Witschas, Dr. Benjamin | ||||||||||||||||||||||||||||||||||||
Deposited On: | 29 Oct 2010 12:56 | ||||||||||||||||||||||||||||||||||||
Last Modified: | 28 Mar 2023 23:38 |
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