Temperature dependence of the Raman scattering spectrum of molten CsCl

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Title

Temperature dependence of the Raman scattering spectrum of molten CsCl (EN)

Creator

Raptis, C (EN)

McGreevy, RL (EN)

Type

journalArticle (EN)

Partial document
Publication in journal (EN)

Article
Scientific article (EN)

Issued

2014-03-01T01:09:05Z

1992 (EN)

Year

1992 (EN)

Description

Light scattering measurements have been carried out in molten CsCl over the temperature range 945-1245 K. Assuming the molten salt system to be a quasi-harmonic oscillator, the authors have found that the integrated intensity of the spectra increases with temperature at rates that exceed those anticipated for first-order scattering. The spectral variation of the intensity shows that the excess scattering, due mainly to second-order summation or difference bands, occurs in the low-frequency region (up to 80 cm-1) and the high-frequency tail (above 150 cm-1). The average depolarization ratio rho d of the spectra remains constant with temperature, but the depolarization ratio spectrum shows that (a) rho d( nu ) increases with T up to approximately=60/sup /cm-1 and (b) decreases with T above 60 cm-1. This is explained as due to a transition of the ions that contribute most strongly to the scattering from an anisotropic environment, determined by binary collisions to a more isotropic environment determined by the average local structure. (EN)

Scientific field

Physics, Condensed Matter (EN)

Natural Sciences ▶ Physical sciences
Condensed Matter Physics (EN)

Subject

HALIDES (EN)

ALKALI (EN)

COLLECTIVE MODES (EN)

LIGHT-SCATTERING (EN)

SALTS (EN)

Journal

Journal of Physics: Condensed Matter (EN)

Language