Sliced velocity map image obtained by monitoring H fragments from CH2OH dissociation at 13 602 cm−1. The intense outer ring correlates with vibrationless CH2O cofragment. The weak inner rings correspond to CH2 rock, wag, and scissors, and CO stretch excitations in the CH2O.
Action spectra for CH2OH and CD2OH one-photon dissociation obtained by monitoring H (D) products. Reactions are indicated in the figure. Solid curves show experimental data. Rovibrational band fits are represented by shaded areas (contours) and lines (spectral line positions and intensities), vertically displaced for clarity. See text for details.
Kinetic energy release distributions in CH2OH and CD2OH one-photon dissociation obtained by monitoring H (D) products. Reactions and excitation energies are indicated in the figure. Origins of vibrational levels of the formaldehyde cofragment (see Table II) are marked by vertical lines. Insets show the lower KER parts with expanded vertical scale.
Dissociation energies (D 0) determined from kinetic energy distributions of H and D fragments. The confidence intervals include energy calibration and KED fitting uncertainties.
Formaldehyde fragment rovibrational distribution parameters obtained from fitting of H and D cofragment kinetic energy distributions (standard deviations in units of the least significant digit are given in parentheses).
Formaldehyde vibrational populations predicted by the model described in Sec. IV B. Deviations from the experimental values in units of the least significant digit are given in parentheses.
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