Experimental information on the spatial extent of the putative p and conduction band states of the hydrated electron (e eq ) has been obtained by monitoring and controlling the electron/hole spatial separation of a photogenerated e eq /hole pair using a femtosecond laser pulse sequence. Optical excitation of e eq with two photons is observed to dramatically alter its spatial distribution and geminate recombination yield with the hole. One-photon excitation, in contrast, has no effect on the spatial distribution. The results strongly confirm theoretical predictions on the size and location of excited states of e eq .
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Son et al. (2001) studied this question.
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