P-ρ-T measurements of H2O up to 260 GPa under laser-driven shock loading

T Kimura; N Ozaki; T Sano; T Okuchi; T Sano; K Shimizu; K Miyanishi; T Terai; T Kakeshita; Y Sakawa; R Kodama

doi:10.1063/1.4919052

P-ρ-T measurements of H2O up to 260 GPa under laser-driven shock loading

J Chem Phys. 2015 Apr 28;142(16):164504. doi: 10.1063/1.4919052.

Authors

T Kimura¹, N Ozaki², T Sano³, T Okuchi⁴, T Sano², K Shimizu⁵, K Miyanishi², T Terai², T Kakeshita², Y Sakawa³, R Kodama²

Affiliations

¹ Geodynamics Research Center, Ehime University, 2-5 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan.
² Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan.
³ Institute of Laser Engineering, Osaka University, Suita, Osaka 565-0871, Japan.
⁴ Institute for Study of the Earth's Interior, Okayama University, Misasa, Tottori 682-0193, Japan.
⁵ KYOKUGEN, Center for Science and Technology under Extreme Conditions, Osaka University, Toyonaka, Osaka 560-8531, Japan.

PMID: 25933771
DOI: 10.1063/1.4919052

Abstract

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.