Ab initio calculation of the ion feature in x-ray Thomson scattering

The spectrum of x-ray Thomson scattering is proportional to the dynamic structure factor. An important contribution is the ion feature which describes elastic scattering of x rays off electrons. We apply an ab initio method for the calculation of the form factor of bound electrons, the slope of the...

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Published inPhysical review. E, Statistical, nonlinear, and soft matter physics Vol. 92; no. 1; p. 013103
Main Authors Plagemann, Kai-Uwe, Rüter, Hannes R, Bornath, Thomas, Shihab, Mohammed, Desjarlais, Michael P, Fortmann, Carsten, Glenzer, Siegfried H, Redmer, Ronald
Format Journal Article
LanguageEnglish
Published United States 06.07.2015
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Summary:The spectrum of x-ray Thomson scattering is proportional to the dynamic structure factor. An important contribution is the ion feature which describes elastic scattering of x rays off electrons. We apply an ab initio method for the calculation of the form factor of bound electrons, the slope of the screening cloud of free electrons, and the ion-ion structure factor in warm dense beryllium. With the presented method we can calculate the ion feature from first principles. These results will facilitate a better understanding of x-ray scattering in warm dense matter and an accurate measurement of ion temperatures which would allow determining nonequilibrium conditions, e.g., along shock propagation.
ISSN:1550-2376
DOI:10.1103/PhysRevE.92.013103