Abstract
The photochemistry of poly(methyl methacrylate) films dopes with 1,1,3,3-tetraphenylacetone was studied using 266-nm laser excitation at energy doses below and above the ablation threshold. The ressults suggest that transient phenomena appear to remain surprisingly simple in spite of the dramatic change induced by the laser pulse. It is also clear that short-lived reaction intermediates play a key role in controlling the absorption properties of the film during the laser pulse.
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