Dephasing processes of molecular vibrations in liquids

S. F. Fischer; A. Laubereau

doi:10.1016/0009-2614(75)85577-1

Dephasing processes of molecular vibrations in liquids

S. F. Fischer, A. Laubereau

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Abstract

A model based on semiclassical collision theory is presented to describe the dephasing of vibrationally excited molecules in a liquid. It is shown that fluctuations of the vibrational frequencies, which are caused by the intermolecular interaction, lead to phase relaxation of a coherently excited state. The theoretical results compare favorably with data of the vibrational dephasing time measured with picosecond probing techniques. The relationship between the dephasing time and the linewidths observed in IR and Raman spectroscopy is discussed.

Original language	English
Pages (from-to)	6-12
Number of pages	7
Journal	Chemical Physics Letters
Volume	35
Issue number	1
DOIs	https://doi.org/10.1016/0009-2614(75)85577-1
State	Published - 15 Aug 1975

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title = "Dephasing processes of molecular vibrations in liquids",

abstract = "A model based on semiclassical collision theory is presented to describe the dephasing of vibrationally excited molecules in a liquid. It is shown that fluctuations of the vibrational frequencies, which are caused by the intermolecular interaction, lead to phase relaxation of a coherently excited state. The theoretical results compare favorably with data of the vibrational dephasing time measured with picosecond probing techniques. The relationship between the dephasing time and the linewidths observed in IR and Raman spectroscopy is discussed.",

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N2 - A model based on semiclassical collision theory is presented to describe the dephasing of vibrationally excited molecules in a liquid. It is shown that fluctuations of the vibrational frequencies, which are caused by the intermolecular interaction, lead to phase relaxation of a coherently excited state. The theoretical results compare favorably with data of the vibrational dephasing time measured with picosecond probing techniques. The relationship between the dephasing time and the linewidths observed in IR and Raman spectroscopy is discussed.

AB - A model based on semiclassical collision theory is presented to describe the dephasing of vibrationally excited molecules in a liquid. It is shown that fluctuations of the vibrational frequencies, which are caused by the intermolecular interaction, lead to phase relaxation of a coherently excited state. The theoretical results compare favorably with data of the vibrational dephasing time measured with picosecond probing techniques. The relationship between the dephasing time and the linewidths observed in IR and Raman spectroscopy is discussed.

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DO - 10.1016/0009-2614(75)85577-1

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Dephasing processes of molecular vibrations in liquids

Abstract

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