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Modelling the scattering of X-rays in warm dense matter
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Gericke, Dirk O., Wuensch, K. and Vorberger, Jan (2009) Modelling the scattering of X-rays in warm dense matter. Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, Vol.606 (No.1-2). pp. 142-145. doi:10.1016/j.nima.2009.03.093 ISSN 0168-9002.
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Official URL: http://dx.doi.org/10.1016/j.nima.2009.03.093
Abstract
We demonstrate the possibilities of classical integral equations (HNC approach) and ab initio quantum simulations (DFT-MD) to yield structural properties of warm dense matter needed to model and interpret X-ray scattering signals. For that goal, the electronic as well as the ionic structure is needed. We show that the classical hypernetted chain equations yield reasonable ion-ion structure factors if statically screened potentials are used. The electronic densities, however, must be calculated fully quantum-mechanically within density functional theory. Taking warm, slightly compressed Lithium as an example, it is demonstrated that the correlations with the surrounding medium modify even wave functions of tightly bound electrons (1s shell) significantly. Due to the more extended wave functions smaller X-ray scattering cross-sections are expected. (C) 2009 Elsevier B.V. All rights reserved.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Library of Congress Subject Headings (LCSH): | X-rays -- Scattering, Dense plasma focus, Plasma (Ionized gases) | ||||
| Journal or Publication Title: | Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment | ||||
| Publisher: | Elsevier Science BV | ||||
| ISSN: | 0168-9002 | ||||
| Official Date: | 11 July 2009 | ||||
| Dates: |
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| Volume: | Vol.606 | ||||
| Number: | No.1-2 | ||||
| Number of Pages: | 4 | ||||
| Page Range: | pp. 142-145 | ||||
| DOI: | 10.1016/j.nima.2009.03.093 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Description: | Heavy Ion Inertial Fusion: Proceedings of the 17th International Symposium on Heavy Ion Inertial Fusion |
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| Funder: | Engineering and Physical Sciences Research Council (EPSRC) | ||||
| Version or Related Resource: | Originally presented at: 17th International Symposium on Heavy Ion Inertial Fusion, Tokyo, Japan, 04-08 Aug 2008 | ||||
| Conference Paper Type: | Paper | ||||
| Type of Event: | Conference |
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