Polarization-selective pump-probe and echo experiments on the OH vibration of HOD in D₂O with 45-femtosecond (fs) infrared pulses are analyzed self-consistently to reveal the time scales for vibrational relaxation, dephasing, and molecular reorientation. Librational motion and hydrogen bond fluctuations on 50- and 180-fs time scales precede picosecond collective reorganization.
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Loparo et al. (2004) studied this question.
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