Abstract
We study shock compressed fused quartz in the nonlinear elastic region using single-shot time-resolved x-ray scattering measurements. The first sharp diffraction peak (FSDP) of fused quartz shifts to the high Q region under shock compression. In contrast, the short-range order structure does not change around 3.5 GPa. The nanosecond FSDP shift provides clear evidence of intermediate-range order structural changes in the nonlinear elastic region. Because the intermediate-order structure is too short to produce the final structural state in the nonlinear elastic region, the FSDP shift is lower compared with hydrostatic experiments.
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