Establishing gold and platinum standards to 1 terapascal using shockless compression
Establishing gold and platinum standards to 1 terapascal using shockless compression
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DOI：
10.1126/science.abh0364
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发表时间：
2021-06-04
期刊：
影响因子：
56.9
通讯作者：
Eggert, J. H.
中科院分区：
文献类型：
--
作者：
Fratanduono, D. E.;Millot, M.;Eggert, J. H.
新技术正在推动高压物理学的前沿超过1万亿帕斯卡，导致新的发现，并为凝聚态理论和先进的数值方法提供严格的测试。然而，绝对确定压力状态的能力仍然具有挑战性，需要校准良好的压力密度参考材料。我们在国家点火装置和Z机上进行了无冲击动态压缩实验，以获得金和铂的准绝对、高精度、压力密度状态方程数据。我们导出了两个实验约束的压力标准，以terapascal条件。建立精确的极端压力实验测定将促进实验和理论之间更好的联系，为提高我们对这些极端条件下材料响应的理解铺平道路。
New techniques are advancing the frontier of high-pressure physics beyond 1 terapascal, leading to new discoveries and offering stringent tests for condensed-matter theory and advanced numerical methods. However, the ability to absolutely determine the pressure state remains challenging, and well-calibrated pressure-density reference materials are required. We conducted shockless dynamic compression experiments at the National Ignition Facility and the Z machine to obtain quasi-absolute, high-precision, pressure-density equation-of-state data for gold and platinum. We derived two experimentally constrained pressure standards to terapascal conditions. Establishing accurate experimental determinations of extreme pressure will facilitate better connections between experiments and theory, paving the way toward improving our understanding of material response to these extreme conditions.