Frequency shift and vibronic relaxation of Raman modes in barium nitrate molecular ionic crystal

Peter G. Zverev; Weiyi Jia; Huimin Liu

doi:10.1117/12.267762

3 March 1997 Frequency shift and vibronic relaxation of Raman modes in barium nitrate molecular ionic crystal

Peter G. Zverev, Weiyi Jia, Huimin Liu

Proceedings Volume 3090, 12th Symposium and School on High-Resolution Molecular Spectroscopy; (1997) https://doi.org/10.1117/12.267762
Event: 12th Symposium and School on High Resolution Molecular Spectroscopy, 1996, St. Petersburg, Russian Federation

Abstract

In this paper the results on high resolution spontaneous Raman spectroscopy of barium nitrate molecular ionic crystal at temperature from 8 to 600 K are presented. The temperature dependencies of the linewidth broadening and frequency shifts of internal Raman modes are investigated. The proposed mechanisms of vibronic relaxation of internal Raman modes exhibit low degree of phonon-phonon coupling in the medium. The phonon frequency shifts are found to be due to lattice expansion and are discussed in terms of Gruneisen parameter theory.

Citation Download Citation

Peter G. Zverev, Weiyi Jia, and Huimin Liu "Frequency shift and vibronic relaxation of Raman modes in barium nitrate molecular ionic crystal", Proc. SPIE 3090, 12th Symposium and School on High-Resolution Molecular Spectroscopy, (3 March 1997); https://doi.org/10.1117/12.267762

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