Theoretical and Computer-Simulation Studies for Correlational Properties of Dense Hydrogen Plasmas

在经典离子-离子关联的超网链(HNC)近似和量子力学电子-电子和电子-离子关联的修正卷积近似(MCA)的基础上，我们用积分方程法分析了稠密氢等离子体的关联性质。通过对关联函数、热力学函数和输运系数的研究，阐明了RPA处理后电子-离子强耦合效应的物理意义。在金属-绝缘体边界附近的密度和温度区域，我们发现关联函数、热力学函数和输运系数的行为表现出与原子绝缘体相非常相似的特征。采用特定的模型描述，分析了嵌入在稠密氢等离子体中的杂质离子C^&lt；5+&gt；和Ne^&lt；9+&gt；的能级。通过求解HNC/MCA积分方程组来描述周围等离子体的平均极化。通过模型计算比较发现，当考虑粒子间强耦合效应和等离子体粒子在束缚电子轨道内的穿透效应时，束缚电子感受到的原子势升高，所产生的能级变浅，较高的能级消失，这两个结果是研究密氢系统中金属-绝缘体相变的重要因素。

On the basis of the hypernetted-chain (HNC) approximation for the classical ion-ion correlation and the modified-convolution approximation (MCA) for the quantum-mechanical electron-electron and electron-ion correlations, we analyzed the correlational properties of dense hydrogen plasmas through an integral-equation approach. Physical significance of the electron-ion strong coupling effects beyond the RPA treatment was elucidated through investigation of the correlation functions, the thermodynamic functions and the transport coefficients. in those density and temperature regions near the metal-insulator boundary, we found that the behaviors of the correlation functions, the thermo-dynamic functions and the transport coefficients exhibited features remarkably analogous to those observed in an atomic insulator phase.Energy levels of impurity ions C^<5+> and Ne^<9+> embedded in dense hydrogen plasmas were analyzed by adopting specific model descriptions for those radiator atoms. The average polarization of surrounding plasmas was described through solution to the HNC/MCA integral equations. Through comparison between model calculations, we found that the atomic potentials felt by the bound electrons were elevated when the interparticle strong coupling effects and the penetration effects of the plasma particles inside the bound-electron orbitals were taken into account; the resulting energy levels became shallower and the higher levels vanished.Those two results above are essential ingredients in studying the metal-insulator transition in dense hydrogen system.