Abstract
Electronic absorption spectroscopy in the range 400–800 nm was coupled to ultrafast laser generated shocks to begin addressing the extent to which electronic excitations are involved in shock induced reactions. Data are presented on shocked polymethylmethacrylate (PMMA) thin films and single crystal pentaerythritol tetranitrate (PETN). Shocked PMMA exhibited thin film interference effects from the shock front. Shocked PETN exhibited interference as well as broadband increased absorption. Relation to shock initiation and the need for time dependent absorption (future experiments) is briefly discussed.
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