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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

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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:
DateEvent
11 July 2009Published
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
Tokyo, Japan, 4–8 August 2008

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

Data sourced from Thomson Reuters' Web of Knowledge

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