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Phys. Rev. B 57, 2663–2666 (1998)

Sound-wave scattering in silica

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A. Wischnewski and U. Buchenau
Institut für Festkörperforschung, Forschungszentrum Jülich, D–52425 Jülich, Federal Republic of Germany

A. J. Dianoux
Institut Laue-Langevin, Boîte Postale 156, F-38042 Grenoble Cedex 9, France

W. A. Kamitakahara
National Institute of Standards and Technology, Reactor Radiation Division, Gaithersburg, Maryland 20899

J. L. Zarestky
Ames Laboratory, Iowa State University, Ames, Iowa 50011

Received 4 April 1997; published in the issue dated 1 February 1998

The combination of x-ray Brillouin scattering data with coherent inelastic neutron scattering results in vitreous silica allows us to identify the scattering mechanisms for high-frequency sound waves in the glass. Below one THz, one has resonant scattering from low-frequency vibrations, above one THz Rayleigh scattering from the atomic disorder.

© 1998 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.57.2663
DOI:
10.1103/PhysRevB.57.2663
PACS:
63.50.+x, 64.70.Pf
 
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