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Nanosecond time-resolved Raman spectroscopy has been performed on cyclic hydrocarbons, benzene, and cyclohexane under laser-driven shock compression at about 1.3 GPa. The spectral peak attributed to the ring-breathing mode of both benzene and cyclohexane showed a blue shift of about 10 cm^-1. Intensity increase of the shifted peak due to the propagation of the shock wave was observed. The decreasing rate of the intensity ratio suggests a decrease in the Raman cross section of compressed matters.
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Matsuda et al. (2002) studied this question.
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