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Investigation of Chemical Processes Involving Laser-generated Nanoenergetic Materials
ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
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The feasibility of a novel approach for studying the chemical reactions between metallic nanoparticles and molecular explosives has been demonstrated. This method is based on the production of nanoparticles in a laser-induced plasma and the simultaneous observation of the atomic and molecular emission characteristic of the species involved in the intermediate chemical reactions of the nanoenergetic material in the plasma. Time-resolved, broadband emission of chemical species involved in the reaction of RDX and various metal nanoparticles was observed. The increase in diatomic carbon C2 and aluminum monoxide AlO emission with increasing aluminum Al content previously observed during an aluminized-RDX explosion in a shock tube was confirmed using this method. The time-evolution of species formation in the plasma, the effects of laser pulse energy, and the effects of trace metal content on chemical reactions were also studied.
APPROVED FOR PUBLIC RELEASE