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X-ray scattering from warm dense iron |
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| Authors: | S. White G. Nersisyan B. Kettle T.W.J. Dzelzainis K. McKeever C.L.S. Lewis A. Otten K. Siegenthaler D. Kraus M. Roth T. White G. Gregori D.O. Gericke R. Baggott D.A. Chapman K. Wünsch J. Vorberger D. Riley |
| Affiliation: | 1. Centre for Plasma Physics, Queen''s University Belfast, University Road, Belfast BT7 1NN, UK;2. Institut für Kernphysik, Technische Universität, Darmstadt, D-64289 Darmstadt, Germany;3. Clarendon Laboratory, University of Oxford, South Parks Road, OX1 3PU, UK;4. Centre for Fusion, Space and Astrophysics, Department of Physics, University of Warwick, Coventry CV4 7AL, UK;5. Plasma Physics Department, AWE plc, Aldermaston, Reading RG7 4PR, UK;6. Max-Planck-Institut für Physik Komplexer Systeme, 01187 Dresden, Germany |
| Abstract: | We have carried out X-ray scattering experiments on iron foil samples that have been compressed and heated using laser-driven shocks created with the VULCAN laser system at the Rutherford-Appleton Laboratory. This is the highest Z element studied in such experiments so far and the first time scattering from warm dense iron has been reported. Because of the importance of iron in telluric planets, the work is relevant to studies of warm dense matter in planetary interiors. We report scattering results as well as shock breakout results that, in conjunction with hydrodynamic simulations, suggest the target has been compressed to a molten state at several 100 GPa pressure. Initial comparison with modelling suggests more work is needed to understand the structure factor of warm dense iron. |
| Keywords: | Warm dense matter Iron X-ray scattering Laser-driven shock wave |
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