The ability to measure temperature in shock wave experiments has been a long-standing scientific challenge complicated by the short timescales involved ($<1$ microsecond) and the presence of nonthermal or external light sources that pollute measured radiances using optical pyrometry methods. In the current work, we present the first experimental data on cerium metal designed to measure the temperature on-Hugoniot from the low-pressure $\alpha$ phase well into the high-pressure liquid phase. Radiance data obtained in this work were used to determine the Hugoniot curves for solid ($\alpha$-Ce) and liquid cerium by measuring the longitudinal stress and temperature simultaneously in the shocked state. These data were used to estimate the temperature for incipient shock melting and complete melting, and to further constrain a multiphase equation of state developed to describe the dynamic response of cerium at high pressures.

中文翻译：

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使用光学高温法检查铈中的高压响应和冲击熔化

在冲击波实验中测量温度的能力一直是一项长期的科学挑战，并且所涉及的时间尺度短（$<\mathrm{1个}$微秒）以及使用光学高温测定法污染测量辐射的非热或外部光源的存在。在当前的工作中，我们提供了有关铈金属的第一个实验数据，该数据旨在测量低压下的Hugoniot温度$\alpha$相很好地进入高压液相。在这项工作中获得的辐射数据用于确定固体的Hugoniot曲线（$\alpha$-Ce）和液态铈，通过在震动状态下同时测量纵向应力和温度。这些数据被用来估计初激熔解和完全熔解的温度，并进一步约束一个多相态方程，该方程描述了铈在高压下的动态响应。