The complex ion structure of warm dense carbon measured by spectrally resolved x-ray scatteringa)
作者： D. Kraus , J. Vorberger , J. Helfrich , D. O. Gericke , B. Bachmann
DOI: 10.1063/1.4920943
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摘要: We present measurements of the complex ion structure warm dense carbon close to melting line at pressures around 100 GPa. High-pressure samples were created by laser-driven shock compression graphite and probed intense laser-generated x-ray sources with photon energies 4.75 keV 4.95 keV. High-efficiency crystal spectrometers allow for spectrally resolving scattered radiation. Comparing ratio elastically inelastically radiation, we find evidence a bonded liquid that is predicted ab-initio quantum simulations showing influence chemical bonds under these conditions. Using different initial densities demonstrate capability resolved scattering monitor solid-liquid transition relatively constant pressure 150 GPa. Showing first single-pulse spectra from cold unprecedented quality recorded Linac Coherent Light Source, outstanding pos...
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