Abstract
Ionization dynamics of ethanol in intense laser fields is investigated by photoelectron–photoion coincidence momentum imaging. Comparisons are made among the photoelectron images for the four different single ionization channels; the parent ion formation, H elimination, CH 3 elimination, and OH elimination. At the intensity of 9.3 TW/cm 2 with the duration of 35 fs, the electronically excited states are prepared directly in the ionization for the CH 3 and OH elimination. As the pulse becomes longer and stronger, the ionization to the electronic ground state becomes dominant even for the CH 3 and OH elimination, suggesting the efficient electronic excitation subsequent to the ionization.
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