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Yaakobi, B. et al.

Extended X-ray absorption fine structure measurements of laser-shocked V and Ti and crystal phase transformation in Ti.

Extended x-ray absorption fine structure (EXAFS), using a laser-imploded target as a source, can yield the properties of laser-shocked metals on a nanosecond time scale. EXAFS measurements of vanadium shocked to approximately 0.4 Mbar yield the compression and temperature in good agreement with hydrodynamic simulations and shock-speed measurements. In laser-shocked titanium at the same pressure, the EXAPS modulation damping is much higher than is warranted by the predicted temperature increase. This is shown to be due to the alpha-Ti to omega-Ti crystal phase transformation, known to occur below approximately 0.1 Mbar for slower shock waves.[1]

References

Extended X-ray absorption fine structure measurements of laser-shocked V and Ti and crystal phase transformation in Ti. Yaakobi, B., Meyerhofer, D.D., Boehly, T.R., Rehr, J.J., Remington, B.A., Allen, P.G., Pollaine, S.M., Albers, R.C. Phys. Rev. Lett. (2004) [Pubmed]

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