用赝势方法计算五种简单金属的Hugoniot曲线

基于本文作者在文献[1]中所导出的冷压P_x,利用德拜固体模型并考虑电子的热压,得到了金属的高温高压状态方程。在与Hugoniot方程联立后,就能算出Hugoniot曲线。本文计算了五种简单金属的Hugoniot曲线。结果表明,在现有实验数据所能达到的范围内,理论计算与实验符合都比较好。关键词：

CALCULATIONS OF HUGONIOT CURVES FOR FIVE SIMPLE METALS WITH PSEUDOPOTENTIAL METHOD

On the basis of the pressure P_x at 0 K deduced by the present authors in the paper [1], using Debye solid model and considering the thermal pressure of electrons, we obtain the equation of state for metals at high temperature and pressure. Combining this equation with Hugoniot equation we can calculate the Hugoniot curves which can be compared with experimental data. The Hugoniot curves for five simple metals (Na, K, Mg, Al and Pb) are calculated. The comparison between theory and experiments shows that the theoretical calculations are all in fairly good agreement with the experiments when the pressure is below 500 kbar for Na and K, 1.7 Mbar for Mg, 4.9 Mbar for Al and 34 Mbar for Pb.