Abstract
Time-of-flight spectra resulting from He(I) photoionization of C 2H 5OH and C 2D 5OD have been measured in coincidence with energy-analyzed photoelectrons to study the ionic dissociation of ethanol. The breakdown curves and kinetic energy releases obtained give no indication of the failure of the energy-randomization hypothesis of quasi-equilibrium theory. The breakdown diagram calculated on the basis of the theory is in fairly good agreement with the present results below 14 eV but does not succeed in interpreting further decomposition of the primary fragments which occurs at higher ionization energies. Some details of the fragmentation pathways are elucidated from the experimental breakdown curves.
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