Overlay of best-fit spectra at 56, 100, 178, 316, 562, and 1000 ps. (Inset) Time-dependent population of CO in its ν = 1 vibrational state (reported as a percentage of the total population of docked CO). The nascent yield of vibrationally excited CO is about 3.6%. The population of vibrationally excited CO decays exponentially with a time constant of 600 ± 150 ps.