Abstract
Ultrafast anti-Stokes Raman measurements of OH stretching excitations (3000–3600 cm −1) in water show an ∼0.4 ps spectral evolution from the red to the blue that is similar to what is seen in the Raman spectrum of water heated to 90 °C. The lifetime of OH stretching excitations T 1=0.7 ps. A small portion of the spectrum on the blue edge of the band decays more slowly with T 1=1.1 ps. A previous measurement of T 1≈0.3 ps for water [J. Chem. Phys. 117 (2002) 1708] is reinterpreted shown to consistent with the present work.
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