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Structure measurements of compressed liquid boron at megabar pressures
oleh: Sebastien Le Pape, Alfredo A Correa, Carsten Fortmann, Paul Neumayer, Tilo Döppner, Paul Davis, Tammy Ma, Laurent Divol, Kai-Uwe Plagemann, E Schwegler, Ronald Redmer, Siegfried Glenzer
Format: | Article |
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Diterbitkan: | IOP Publishing 2013-01-01 |
Deskripsi
We report on the first measurements of the structure of compressed liquid boron, as it crosses the melt line in dynamic shock-compression experiments at a pressure of 100 GPa. Temporally, spectrally and angularly resolving x-ray scattering provides an independent and accurate measurement of the compression factor 1.5 and the electron density of 4 × 10 ^23 cm ^−3 at moderate temperatures of 0.2–1 eV. At these conditions, the elastic scattering measurements provide the structure factor and indicate the liquid compressed phase with a coordination number of 8.3 in good agreement with predictions from first-principles molecular dynamic simulations.