Science and Technology of Energetic Materials

Vol.67, No.4 (2006)

Research paper

Phase transition of sulfur during the compression by laser-induced nano-shock
Shuji Ye, Mitsuo Izumo, Masataka Sakai, and Mitsuo Koshi


A time-resolved Raman system was constructed to observe the shock response of sulfur powder under the laser-driven shock compression conditions. The local pressure was estimated on the basis of the Rankine-Hugoniot relation and the particle velocity measured by VISAR (Velocity Interferometer System for Any Reflector). Maximum pressure obtained by the present apparatus was estimated to be 0.75 GPa. It is found that the Raman intensities behind the shock wave decreased rapidly (within 50 ns), and the intensity did not recover after the shock compression. The melting of the crystal, or the formation of amorphous sulfur can explain these observations. The vibrational temperature corresponding to the line at 218 cm-1 was higher than the bulk temperature behind the shock wave.

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Laser shock, High pressure, Phase transition, Sulfur

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