Journal
PHYSICS OF PLASMAS
Volume 15, Issue 7, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.2956646
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Simulations consistently combining classical molecular dynamics applied to nuclei and Thomas-Fermi-Dirac-Weizsacker theory applied to electrons are used to calculate both pressure and internal energy of a boron plasma along the isotherms T=1 and 4 eV. A regularized pseudopotential must be used to represent the electron-nucleus interaction; a correction of the internal energy computed allowing for the use of this pseudopotential is proposed. Comparison with results obtained by quantum molecular dynamics shows that including the gradient correction of order 1 in the gradient expansion of the electronic free energy allows to increase the domain of validity of simulations by about 30 g/cm(3) toward low densities. (c) 2008 American Institute of Physics.
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