Physical Review Letters · 1984 · 127 citations · 16 references
Phase TransitionsDynamic Equation-of-state DataEngineeringPhase EquilibriaFluid NitrogenContinuous Phase TransitionSimple LiquidMolecular DynamicsFluid PropertiesMolecular ThermodynamicsThermodynamicsPhase SeparationEquilibrium Thermodynamic PropertyShock CompressionPhysicsMolecular DissociationDetonation PhenomenonPhase EquilibriumApplied PhysicsCondensed Matter Physics
Dynamic equation-of-state data are presented for liquid ${\mathrm{N}}_{2}$ single- and double-shocked to pressures of 100 GPa (1 Mbar), compressions to fourfold over initial liquid density, and internal energies to 1 MJ/mole. Three double-shock points lie above the principal Hugoniot in pressure-volume space, the first such observation in condensed matter. The data are interpreted in terms of a continuous phase transition, identified as molecular dissociation by comparison of the shock compression curves of liquid ${\mathrm{N}}_{2}$ and isoelectronic CO.
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