Edinburgh Research Explorer

Raman spectroscopy of hot dense hydrogen

Research output: Contribution to journalArticle

Related Edinburgh Organisations

Original languageEnglish
Article number175701
Number of pages4
JournalPhysical Review Letters
Volume90
Issue number17
DOIs
Publication statusPublished - 2 May 2003

Abstract

High P-T Raman measurements of solid and fluid hydrogen to above 1100 K at 70 GPa and to above 650 K in 150 GPa range, conditions previously inaccessible by static compression experiments, provide new insight into the behavior of the material under extreme conditions. The data give a direct measure of the melting curve that extends previous optical investigations by up to a factor of 4 in pressure. The magnitude of the vibron frequency temperature derivative (dnu/dT)(P) increases by a factor of similar to30 over the measured pressure range, indicating an increase in intrinsic anharmonicity and weakening of the molecular bond.

    Research areas

  • X-RAY-DIFFRACTION, SOLID MOLECULAR-HYDROGEN, EQUATION-OF-STATE, GPA 1.4 MBAR, MEGABAR PRESSURES, ELECTRICAL-CONDUCTIVITY, LIQUID DEUTERIUM, PHASE-TRANSITION, MELTING CURVES, METALLIZATION

ID: 11469989