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 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.
Institut für Physik, Universität Rostock, D-18051 Rostock, Germany.
Kai-Uwe
KU
Plagemann
Institut für Physik, Universität Rostock, D-18051 Rostock, Germany.
Hannes R
HR
Rüter
Institut für Physik, Universität Rostock, D-18051 Rostock, Germany.
Thomas
T
Bornath
Institut für Physik, Universität Rostock, D-18051 Rostock, Germany.|Physics Department, Faculty of Science, Tanta University, 31527 Tanta, Egypt.
Mohammed
M
Shihab
Sandia National Laboratories, Albuquerque, New Mexico 87185, USA.
Michael P
MP
Desjarlais
Quantumwise A/S, Lersø Parkallé 107, DK-2100 Copenhagen, Denmark.
Carsten
C
Fortmann
High Energy Density Science, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
Siegfried H
SH
Glenzer
Institut für Physik, Universität Rostock, D-18051 Rostock, Germany.
Ronald
R
Redmer