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Observation of a dynamical central peak in the light‐scattering spectrum of a glass
1.L. D. Landau and G. Placzek, Phys. Z. Sowjetunion 5, 172 (1934).
2.I. L. Fabelinskii, Molecular Scattering of Light (Plenum, New York, 1968).
3.By a “dynamical” central line or peak we mean one which has a spectral width () arising from the thermal fluctuations of an ideal substance and not the commonly observed light scattered from inclusions, impurities, strains, domain walls, bubbles, etc.
4.L. Boyer, R. Vacher, L. Cecchi, M. Adam, and P. Berge [Phys. Rev. Lett. 26, 1435 (1971)] observed a 5‐GHz‐wide central component in cubic succinonitrile due to damped molecular rotations.
5.L. A. Firstein, G. A. Barbosa, and S. P. S. Porto [Proceedings of the Third International Conference on Light Scattering in Solids, Campinas, Brazil, 1975 (unpublished)]
5.observed a clearly dynamical central component in cubic at and below room temperature. This feature was uncorrelated with the “critical opalescence” seen near the 110 °K phase transition by E. F. Steigmeier, H. Auderset, and G. Harbeke [Solid State Commun. 12, 1077 (1973)]. Dynamical properties of this latter central component have not yet been seen.
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9.R. Hellwarth, J. Cherlow, and T.‐T. Yang, Phys. Rev. B 11, 964 (1975).
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