https://doi.org/10.1140/epjd/e2004-00059-5
X-ray Thomson scattering in warm dense matter
1
Argonne National Laboratory, Physics Division, 9700 S. Cass Avenue,
Argonne IL 60439, USA
2
Universität Rostock, Fachbereich Physik, 18051 Rostock, Germany
3
The University of Western Australia, Department of Physics,
Nedlands WA 6907, Australia
Corresponding authors: a hoell@phy.anl.gov - b ronald.redmer@physik.uni-rostock.de - c gerd.roepke@physik.uni-rostock.de - d heidi@physics.uwa.edu.au
Received:
12
February
2004
Published online:
20
April
2004
The scattering of photons in plasmas is an important diagnostic
tool. Especially, the region of warm dense matter can be probed by
X-ray Thomson scattering. The scattering cross-section is related
to the dynamic structure factor 
. We improve the
standard treatment of the scattering on free electrons within the
random phase approximation (RPA) by including collisions. The
dielectric function is calculated in the Born–Mermin approximation.
The inclusion of collisions modifies the dynamic structure factor
significantly in the warm dense matter regime. We conclude that a
theoretical description beyond the RPA is needed to derive reliable
results for plasma parameters from X-ray Thomson scattering
experiments.
PACS: 52.25.Os – Emission, absorption, and scattering of electromagnetic radiation / 52.70.La – X-ray and gamma-ray measurements / 61.10.Eq – X-ray scattering (including small-angle scattering) / 71.10.Ca – Electron gas, Fermi gas
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2004
