Tracing temperature and pressure evolutions in shocked TATB‐based PBX by time‐resolved Raman spectroscopy.

Time‐resolved Raman spectroscopy has been used to simultaneously measure temperature and pressure in the TATB‐based plastic‐bonded explosive (PBX) sample under laser‐driven shock wave. Temperature and pressure have been confirmed according to the ratio of anti‐Stokes to Stokes Raman intensities and the variation of the center wavenumber of the Raman peak under shock loading, respectively. The location of the shock front has been determined according to the ratio of the spectral height of the shifted Raman peak under shock loading to that of the original Raman peak, and the velocity of the shock front has been estimated by linear fit for the locations of the shock front versus delay times. Therefore, the shock propagation in this PBX sample is characterized according to the measured temperature, pressure, and shock velocity. In addition, the correlation between the pressure and the temperature under shock waves is established, and the pressure‐dependence temperature gradient is 10.06 ± 0.67 K/GPa. [ABSTRACT FROM AUTHOR]