New Phases and Dissociation-Recombination of Hydrogen Deuteride to 3.4 Mbar
New Phases and Dissociation-Recombination of Hydrogen Deuteride to 3.4 Mbar
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DOI：
10.1103/physrevlett.116.145501
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发表时间：
2016-04-08
影响因子：
8.6
通讯作者：
Silvera, Isaac F.
中科院分区：
文献类型：
--
作者：
Dias, Ranga P.;Noked, Ori;Silvera, Isaac F.
在金刚石对顶砧装置上，研究了固体氘化氢在压力高达340 GPa（100 GPa = 1 Mbar），温度在5-295 K范围内的红外吸收。在198 GPa以上，HD样品转变为HD、H-2和D-2的混合物，解释为解离和重组的过程。观察到三个新的相线，其中两个显着不同的高压homestrant物种，但没有金属。分析随时间变化的光谱变化，以确定作为时间的函数的分子浓度;核子交换在类似于200 GPa下在类似于20 h内达到稳态浓度。
We present infrared absorption studies of solid hydrogen deuteride to pressures as high as 340 GPa (100 GPa = 1 Mbar) in a diamond anvil cell and temperatures in the range 5-295 K. Above 198 GPa the HD sample transforms to a mixture of HD, H-2, and D-2, interpreted as a process of dissociation and recombination. Three new phase lines are observed, two of which differ remarkably from those of the high-pressure homonuclear species, but none are metallic. The time-dependent spectral changes are analyzed to determine the molecular concentrations as a function of time; the nucleon exchange achieves steady state concentrations in similar to 20 h at similar to 200 GPa.