<i>In situ</i> time-resolved Raman spectroscopy of nitromethane under static and dynamic compression

Energetic materials are extensively used as propellants in rockets demanding the understanding of their chemical and thermal stability for safe storage transportation well ease decomposition. Nitromethane (NM) is one such material with significant performance advantage over other mono propellants. In this manuscript, we report detailed molecular-level behavior NM under static dynamic compression. Dynamic compression experiments were performed up to ∼6.4 GPa using a 2 J/8 ns Nd: YAG laser coupled time-resolved Raman spectroscopy (TRRS) setup. Static ∼20 diamond anvil cell. During laser-driven shock compression, undergoes three phase transitions at 1.1, 2.5, 3.4 GPa. However, case corresponding observed 0.3, 1.3–1.8, 2.5 TRRS was also 300 mJ (1.47 GW/cm2), 500 (2.45 800 (3.9 GW/cm2) intensity ratios shocked un-shocked peaks utilized experimentally calculate velocities, which determined be 2.66 ± 0.09, 3.58 0.40, 3.83 0.60 km/s, respectively. These experimental results corroborated one-dimensional (1D) radiation hydrodynamics simulations, obtain pressure. The velocities these intensities calculated 2.98, 3.69, 3.92 respectively, reasonably close agreement our results.