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Nature of background scattering in Raman spectra of materials containing high-wavenumber vibrations

✍ Scribed by D. I. Ostrovskii; A. M. Yaremko; I. P. Vorona

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
400 KB
Volume
28
Category
Article
ISSN
0377-0486

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✦ Synopsis

A new interpretation for the often observed phenomenon of "Raman backgroundÏ is presented and discussed. It is shown that in many cases the appearance of the background for various materials (organic and inorganic) is associated with the presence of high-wavenumber m(XH) vibrations. The nature of the observed broad band can be explained by strong anharmonic interaction between high-wavenumber excitation and low-wavenumber phonons. The results of theoretical evaluations are presented. Using the approach proposed, a good description of the unusual spectral features for several materials has been achieved. 1997

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