The paper presents analytical expressions for the dielectric function, refractive index, absorption coefficient and reflection coefficient of radiation in a classical two-component fully ionized plasma. The expressions are based on the results of numerical calculations of the conductivity for the ultracold plasma model. These analytical expressions have simple form and depend only on two dimensionless variables: the frequency normalized to the plasma frequency and the strong coupling parameter. In this regard, they are applicable for any classical nondegenerate plasma in a wide frequency range and the strong coupling parameter. Comparison with various experimental data for low-temperature plasma is given.

本文给出了经典的两组分完全电离等离子体中辐射的介电函数，折射率，吸收系数和反射系数的解析表达式。该表达式基于超冷等离子体模型的电导率的数值计算结果。这些分析表达式形式简单，仅取决于两个无量纲变量：归一化为等离子体频率的频率和强耦合参数。在这方面，它们适用于宽频率范围和强耦合参数的任何经典的非简并等离子体。给出了与低温等离子体的各种实验数据的比较。