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Relative peak amplitudes (squares, circles triangles) for the phenol dissolved in phenylacetylene. All of the points are normalized by the R state amplitude. The black line is the fit T state amplitude. The red circles are the T→R exchange off-diagonal peak amplitudes, and the green triangles are the R→T exchange off-diagonal peak amplitudes. The red line is the fit for the off-diagonal peak amplitudes. The fits yield the T→R exchange time constant of 4.2 ps (see text).
