Article

Equation of state and interaction potential of helium under high temperatures and high densities

Science in China Series G Physics Mechanics and Astronomy (impact factor: 1.41). 05/2012; 52(2):161-165. DOI:10.1007/s11433-009-0019-z pp.161-165

ABSTRACT Based on the thermodynamics statistic method, the improved variational perturbation theory and the modified quantum mechanics
correction model have been used to calculate the equation of state of liquid helium at pressure from 0.7 to 108 GPa. The calculation
results are in good agreement with the experimental data. The EXP-6 potential (α = 13.1) can more accurately describe the interaction of helium atoms than other potentials in the scheme. Finally, a comparison
is shown between our interatomic potentials and other potentials.

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Keywords

EXP-6 potential
 
experimental data
 
helium atoms
 
improved variational perturbation theory
 
interatomic potentials
 
liquid helium
 
potentials
 

JinWen Yang