Demonstration of X-ray Thomson scattering as diagnostics for miscibility in warm dense matter.

ABSTRACT: The gas and ice giants in our solar system can be seen as a natural laboratory for the physics of highly compressed matter at temperatures up to thousands of kelvins. In turn, our understanding of their structure and evolution depends critically on our ability to model such matter. One key aspect is the miscibility of the elements in their interiors. Here, we demonstrate the feasibility of X-ray Thomson scattering to quantify the degree of species separation in a 1:1 carbon-hydrogen mixture at a pressure of ~150 GPa and a temperature of ~5000 K. Our measurements provide absolute values of the structure factor that encodes the microscopic arrangement of the particles. From these data, we find a lower limit of [Formula: see text]% of the carbon atoms forming isolated carbon clusters. In prin

SUBMITTER: Frydrych S 

PROVIDER: S-EPMC7251136 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature