Construction of a wide-range tabular equation of state for copper

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Abstract
A global equation of state (EOS) for copper has been constructed, ranging from densities of 10−3–103 Mg/m3 and from ambient temperatures to 5×104 eV (1 eV=11604.5 K). Six different theoretical models were used: a soft sphere liquid model at low temperatures below melt density; an ionization equilibrium model based on a modified Saha method at moderate temperatures in expansion; a nonideal plasma theory for high temperatures; a modified Thomas–Fermi–Kirzhnits model in compression; rigorous electron band theory for the zero degree isotherm; and a semiempirical model in the solid-liquid-vapor region. Assembly of the EOS will be described. Agreement with existing experimental data is good.