Equation-of-state (pressure, density, temperature, internal energy) and reflectivity measurements on shock-compressed ${\mathrm{CO}}_2$ at and above the insulating-to-conducting transition reveal new insight into the chemistry of simple molecular systems in the warm-dense-matter regime. ${\mathrm{CO}}_2$ samples were precompressed in diamond-anvil cells to tune the initial densities from $1.35\mathrm{g}/{\mathrm{cm}}^3$ (liquid) to $1.74\mathrm{g}/{\mathrm{cm}}^3$ (solid) at room temperature and were then shock compressed up to 1 TPa and 93 000 K. Variation in initial density was leveraged to infer thermodynamic derivatives including specific heat and Gruneisen coefficient, exposing a complex bonded and moderately ionized state at the most extreme conditions studied.

中文翻译：

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压缩到1 TPa的CO2冲击状态方程

冲击压缩后的状态方程（压力，密度，温度，内部能量）和反射率测量 ${\mathrm{一氧化碳}}_2$ 从绝缘到导电的过渡及以上，揭示了对热致密物质体系中简单分子系统化学的新见解。 ${\mathrm{一氧化碳}}_2$ 样品在金刚石-铁砧细胞中预压缩，以调节样品的初始密度。 $1.35\mathrm{G}/{\mathrm{厘米}}^3$ （液体）到 $1.74\mathrm{G}/{\mathrm{厘米}}^3$ （固体）在室温下，然后震荡压缩至1 TPa和93 000K。利用初始密度的变化推断热力学衍生物，包括比热和Gruneisen系数，在最极端的条件下暴露出复杂的键合和中等电离态研究。