APS Logo

Isotope Effects on High-Pressure Water

POSTER

Abstract

Recent observations on superionic water reveal a rich phase behavior including dissociation, hydrogen melting, rapid hydrogen ion diffusion through an oxygen lattice, oxygen melting, and a transition from ionic to mostly electronic conduction. To better understand this complex phase diagram we explored its dependence on exchanging deuterium for hydrogen. D2O was precompressed in diamond-anvil cells and then compressed through laser-driven shocks on the OMEGA laser at the University of Rochester’s Laboratory for Laser Energetics. Shock velocity and temperature were measured using the velocity interferometer system for any reflector and streaked optical pyrometer diagnostics and used to determine mechanical, thermal, and transport properties of heavy water to 500 GPa. This material is based upon work supported by the Department of Energy National Nuclear Security Administration under Award Number DE-NA0003856.

Presenters

  • Heather M Pantell

    University of Rochester, Laboratory for Laser Energetics, U. of Rochester

Authors

  • Heather M Pantell

    University of Rochester, Laboratory for Laser Energetics, U. of Rochester

  • Linda E Hansen

    University of Rochester, University of Rochester, LLE, Laboratory for Laser Energetics, U. of Rochester

  • Grigoriy Tabak

    University of Rochester, Laboratory for Laser Energetics, U. of Rochester

  • Margaret F Huff

    Lab for Laser Energetics, Laboratory for Laser Energetics, U. of Rochester

  • Gerrit Bruhaug

    University of Rochester, Laboratory for Laser Energetics, U. of Rochester

  • J. Ryan R Rygg

    University of Rochester, Laboratory for Laser Energetics, U. of Rochester

  • Gilbert Collins

    University of Rochester, Laboratory for Laser Energetics, University of Rochester, Laboratory for Laser Energetics, U. of Rochester