Equation of state and melting curve of helium to very high pressure

Journal Article · Sun Nov 01 04:00:00 EST 1981 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.24.5119· OSTI ID:5888664

Young, D A; McMahan, A K; Ross, M

An ''exponential-six'' interatomic pair potential, together with accurate statistical models for solid and liquid phases, is shown to yield good agreement with experimental pressure-volume and melting-curve data for /sup 4/He up to 120 kbar. For pressures from 120 kbar to 250 Mbar, linear-muffin-tin-orbitals electron-band-theory calculations have been used to obtain the T = 0 pressure-volume isotherm. An effective pair potential is fitted to these results in order to compute the melting curve and shock Hugoniot curve in this region. The band-theory calculations indicate T = 0 metallization at 112 Mbar.

• Research Organization: University of California, Lawrence Livermore National Laboratory, Livermore, California 94550
• OSTI ID: 5888664
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 24:9; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
BAND THEORY
BINDING ENERGY
ELEMENTS
ENERGY
EQUATIONS
EQUATIONS OF STATE
FLUIDS
GASES
HELIUM
ISOTHERM
MATHEMATICAL MODELS
MELTING
MUFFIN-TIN POTENTIAL
NONMETALS
PAIRING ENERGY
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
POTENTIALS
RARE GASES
SHOCK WAVES
STATISTICAL MODELS
THERMODYNAMIC PROPERTIES
VERY HIGH PRESSURE