Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1772765 | High Energy Density Physics | 2010 | 8 Pages |
Abstract
Individual configurations obtained from molecular dynamics simulations have been combined with a real-space finite-difference computation of x-ray absorption near edge spectra (XANES) to obtain a measurable signature of the local order in a dense (shock-)compressed material. The approach makes use of the finite-temperature neutral pseudoatom concept. K-edge XANES spectra along the principal Hugoniot of aluminum have been obtained up to the density of 7 g/cm3. The results obtained indicate that a strong local order may exist in compressed matter even for temperatures of the order of 1 eV. We found that the red shift of the onset of absorption is only a temperature effect.
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Astronomy and Astrophysics
Authors
O. Peyrusse,