Correlation functions ϕ(t) and correlation times were obtained by Fourier transformation of the degenerate fundamental bands v24 and v21 of liquid cyclohexane. Reorientational correlation functions were calculated based on the Kubo line shape theory in order to extract the contribution of vibrational relaxation. Dephasing caused by short range interactions is a possible mechanism for vibrational relaxation at least for v21.
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