Abstract
AbstractThe isotopic structure of the ν1 line in the isotropic Raman spectrum of liquid carbon tetrachloride was studied. A new fitting procedure was employed enabling one to fit overlapping lines, obtaining dynamic parameters at the same time. The time‐correlation functions of vibrational dephasing were first found for each isotopic species present in the liquid at their natural abundance. The isotopic dependence of the characteristic times of vibrational dephasing and vibrational frequency modulation was analysed. The isotopic dependence of dephasing times is contained primarily in the frequency factor: the dephasing times decrease with decreasing line frequency. This dependence entirely outweighs the opposite relationship between the dephasing times and masses. The frequency modulation times show the same trend, which contradicts the simple collision model. Copyright © 2002 John Wiley & Sons, Ltd.
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