Hugoniot Data for Carbon at Megabar Pressures

  • Batani D
  • Strati F
  • Stabile H
 et al. 
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Abstract

We present an experimental point for the carbon equation of state (EOS) at megabar pressures, obtained by laser-driven shock waves. The rear side emissivity of "two-materials two-steps" targets (Al-C) was recorded with space and time resolution and, by applying the impedance mismatch method, allowed a direct determination of relative EOS points. Experiments were performed at the PALS and LULI laboratories using carbon samples with two different values of initial density, in order to explore a wider region of the phase diagram. Previously unreached pressures were obtained. The results are compared with previous experiments and with available theoretical models and seem to show a high compressibility of carbon at megabar pressures.

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Authors

  • D. Batani

  • F. Strati

  • H. Stabile

  • M. Tomasini

  • G. Lucchini

  • A. Ravasio

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