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Title: New Phases and Dissociation-Recombination of Hydrogen Deuteride to 3.4 Mbar

Abstract

Here, we present infrared absorption studies of solid hydrogen deuteride to pressures as high as 340 GPa (100 GPa = 1 Mbar) in a diamond anvil cell and temperatures in the range 5–295 K. Above 198 GPa the HD sample transforms to a mixture of HD, H 2, and D 2, interpreted as a process of dissociation and recombination. Three new phase lines are observed, two of which differ remarkably from those of the highpressure homonuclear species, but none are metallic. The time-dependent spectral changes are analyzed to determine the molecular concentrations as a function of time; the nucleon exchange achieves steady state concentrations in ~20 h at ~200 GPa.

Authors:
 [1];  [1];  [1]
  1. Harvard Univ., Cambridge, MA (United States)
Publication Date:
Research Org.:
Harvard Univ., Cambridge, MA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
Contributing Org.:
Dept of Physics, Harvard University
OSTI Identifier:
1439437
Alternate Identifier(s):
OSTI ID: 1246515
Grant/Contract Number:  
NA0001990
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 116; Journal Issue: 14; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN

Citation Formats

Dias, Ranga P., Noked, Ori, and Silvera, Isaac Franklin. New Phases and Dissociation-Recombination of Hydrogen Deuteride to 3.4 Mbar. United States: N. p., 2016. Web. doi:10.1103/PhysRevLett.116.145501.
Dias, Ranga P., Noked, Ori, & Silvera, Isaac Franklin. New Phases and Dissociation-Recombination of Hydrogen Deuteride to 3.4 Mbar. United States. doi:10.1103/PhysRevLett.116.145501.
Dias, Ranga P., Noked, Ori, and Silvera, Isaac Franklin. Fri . "New Phases and Dissociation-Recombination of Hydrogen Deuteride to 3.4 Mbar". United States. doi:10.1103/PhysRevLett.116.145501. https://www.osti.gov/servlets/purl/1439437.
@article{osti_1439437,
title = {New Phases and Dissociation-Recombination of Hydrogen Deuteride to 3.4 Mbar},
author = {Dias, Ranga P. and Noked, Ori and Silvera, Isaac Franklin},
abstractNote = {Here, we present infrared absorption studies of solid hydrogen deuteride to pressures as high as 340 GPa (100 GPa = 1 Mbar) in a diamond anvil cell and temperatures in the range 5–295 K. Above 198 GPa the HD sample transforms to a mixture of HD, H2, and D2, interpreted as a process of dissociation and recombination. Three new phase lines are observed, two of which differ remarkably from those of the highpressure homonuclear species, but none are metallic. The time-dependent spectral changes are analyzed to determine the molecular concentrations as a function of time; the nucleon exchange achieves steady state concentrations in ~20 h at ~200 GPa.},
doi = {10.1103/PhysRevLett.116.145501},
journal = {Physical Review Letters},
number = 14,
volume = 116,
place = {United States},
year = {2016},
month = {4}
}

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Cited by: 7 works
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Works referenced in this record:

Granulation, Phase Change, and Microstructure Kinetics of Phase Change. III
journal, February 1941

  • Avrami, Melvin
  • The Journal of Chemical Physics, Vol. 9, Issue 2, p. 177-184
  • DOI: 10.1063/1.1750872

Kinetics of Phase Change. I General Theory
journal, December 1939

  • Avrami, Melvin
  • The Journal of Chemical Physics, Vol. 7, Issue 12, p. 1103-1112
  • DOI: 10.1063/1.1750380