Pressure dependence of the vibron in H[sub 2], HD, and D[sub 2]: Implications for inter- and intramolecular forces

Journal Article · Mon Nov 01 04:00:00 EST 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.48.12613· OSTI ID:6128956

Moshary, F; Chen, N H; Silvera, I F ^[1]

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1. Lyman Laboratory of Physics, Harvard University, Cambridge, Massachusetts 02138 (United States)

We have measured the [nu]=0[r arrow]1 Raman-active vibron in HD to 120 GPa. We combine our results with previous work in H[sub 2], HD, and D[sub 2] to study inter- and intramolecular coupling in solid hydrogen to megabar pressures. We find that a model potential composed of inter- and intramolecular parts may be used to explain experimental results over a large pressure range. On the other hand, analyzing the intramolecular coupling using a Morse-type effective pair potential yields results that seem unphysical. We have also observed that HD molecules are stable against formation of H[sub 2] and D[sub 2] to the highest pressures studied.

• OSTI ID: 6128956
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 48:17; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

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75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRYSTALS
DEUTERIDES
DEUTERIUM
DEUTERIUM COMPOUNDS
ELEMENTS
ENERGY LEVELS
EXCITED STATES
HIGH PRESSURE
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HYDROGEN COMPOUNDS
HYDROGEN DEUTERIDE
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LIGHT NUCLEI
MOLECULAR CRYSTALS
NONMETALS
NUCLEI
ODD-ODD NUCLEI
PRESSURE DEPENDENCE
RAMAN SPECTRA
SPECTRA
STABLE ISOTOPES
VERY HIGH PRESSURE
VIBRATIONAL STATES