P-ρ-T measurements of H2O up to 260 GPa under laser-driven shock loading.
Pressure, density, and temperature data for H2O were obtained up to 260 GPa by using laser-driven shock compression technique. The shock compression technique combined with the diamond anvil cell was used to assess the equation of state models for the P-ρ-T conditions for both the principal Hugoniot and the off-Hugoniot states. The contrast between the models allowed for a clear assessment of the equation of state models. Our P-ρ-T data totally agree with those of the model based on quantum molecular dynamics calculations. These facts indicate that this model is adopted as the standard for modeling interior structures of Neptune, Uranus, and exoplanets in the liquid phase in the multi-Mbar range.
Geodynamics Research Center, Ehime University, 2-5 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan.
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Kimura
Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan.
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Ozaki
Institute of Laser Engineering, Osaka University, Suita, Osaka 565-0871, Japan.
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Sano
Institute for Study of the Earth's Interior, Okayama University, Misasa, Tottori 682-0193, Japan.
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Okuchi
Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan.
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Sano
KYOKUGEN, Center for Science and Technology under Extreme Conditions, Osaka University, Toyonaka, Osaka 560-8531, Japan.
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Shimizu
Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan.
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Miyanishi
Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan.
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Terai
Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan.
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Kakeshita
Institute of Laser Engineering, Osaka University, Suita, Osaka 565-0871, Japan.
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Sakawa
Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan.
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Kodama