TIME-RESOLVED OPTICAL SPECTROSCOPY TO EXAMINE CHEMICAL DECOMPOSITION OF ENERGETIC MATERIALS UNDER STATIC HIGH-PRESSURE AND PULSED HEATING CONDITIONS

A new approach that permits real time (ns to mu s) investigation of co ndensed phase chemical reactions under extreme conditions of high pres sure and high temperature is presented. Time resolved absorption and e mission spectroscopy has been used in conjunction with a high pressure gem anvil cell to monitor chemical changes initiated by pulsed laser heating in statically compressed samples. Absorption measurements are presented for 3,6-trinitroethylaminetetrazine samples pressurized up t o 4.0 GPa. Emission measurements are presented for aluminum/water comb ustion at pressures to 0.8 GPa. The experimental approach is also expe cted to be valuable for examining temperature induced changes in stati cally compressed inert materials.