Hydrogen Deuteride to 3.4 Megabar Mixed Isotopes and New Phases

ORAL

Abstract

We present infrared absorption studies of solid hydrogen deuteride to pressures as high as 3.4 megabar in a diamond anvil cell and temperatures in the range 5 to 295 K. Above 198 GPa the sample transforms to a mixture of $_{,}$ and, interpreted as a process of dissociation and recombination.$_{\, \, }$Three new phases-lines are observed, two of which differ remarkably from those of the high-pressure homonuclear species, but none are metallic. The time-dependent spectral changes are analyzed to determine the molecular concentrations as a function of time.y.

*The NSF, grant DMR-1308641 and the DOE Stockpile Stewardship Academic Alliance Program, grant DE-FG52-10NA29656 supported this research.

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Authors

  • Ranga Dias

    • Lyman Laboratory of Physics, Harvard University, Cambridge, MA 02138

  • Ori Noked

    • Lyman Laboratory of Physics, Harvard University, Cambridge, MA 02138

  • Isaac Silvera

    • Lyman Laboratory of Physics, Harvard University, Cambridge,MA 02138
    • Lyman Laboratory of Physics, Harvard University, Cambridge, MA 02138