Multishock to quasi-isentropic compression of dense gaseous deuterium-helium mixtures up to 120 GPa: Probing the sound velocities relevant to planetary interiors
Multishock to quasi-isentropic compression of dense gaseous deuterium-helium mixtures up to 120 GPa: Probing the sound velocities relevant to planetary interiors
复制标题
高达 120 GPa 的致密气态氘氦混合物的多重冲击到准等熵压缩：探测与行星内部相关的声速
DOI：
10.1103/physrevlett.126.075701
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发表时间：
2021
影响因子：
8.6
通讯作者：
Lei Liu et. al
中科院分区：
文献类型：
--
作者：
Guo-Jun Li;Zhi-Guo Li;Qi-Feng Chen;Yun-Jun Gu;Wei Zhang;Lei Liu et. al
为了提供与行星内部条件相关的热力学参数，对稠密气态氘氦混合物进行了激波混响压缩实验。多次冲击压力高达120 GPa，再冲击温度高达7400 K。此外，从激波绝热到准等熵压缩的独特压缩路径使得能够直接估计未探索的50-120 GPa范围内的高压声速。物态方程和声速提供了特殊的双重视角来验证理论模型。我们的实验数据与天体物理学中广泛使用的几种状态方程模型在探测的压力范围内一致。目前的数据改善16.16声速在木星绝缘金属过渡层的实验约束。
Shock reverberation compression experiments on dense gaseous deuterium–helium mixtures were carried out to provide thermodynamic parameters relevant to the conditions in planetary interiors. The multishock pressures were determined up to 120 GPa and reshock temperatures to 7400 K. Furthermore, the unique compression path from shock-adiabatic to quasi-isentropic compressions enables a direct estimation of the high-pressure sound velocities in the unexplored range of 50–120 GPa. The EOS and sound velocity provide particular dual perspectives to validate the theoretical models. Our experimental data are found to agree with several EOS models widely 15.used in astrophysics within the probed pressure range. The current data improve the experimental constraints on 16.sound velocities in the Jovian insulating-to-metallic transition layer.