X-Ray Diffraction of Platinum

Laser-driven experiments at the University of Rochester's Laboratory for Laser Energetics were performed to probe the crystal structure of shock and shock-ramped platinum with the powder x-ray diffraction platform\footnote{ J. R. Rygg \textit{et al.}, Rev. Sci. Instrum. \textbf{83}, 113904 (2012).} on OMEGA EP. Platinum is of interest because it is often used as a calibration standard in high-pressure experiments. The samples remained face-centered cubic when shock-ramped up to \textasciitilde 350 GPa and liquid diffraction was observed upon further compression. These experiments serve as additional measurements of shock-ramped, shocked, and shock-released platinum completed at Sandia National Laboratories and the National Ignition Facility. This material is based upon work supported by the Department of Energy National Nuclear Security Administration under Award Number DE-NA0003856.