title: Predictions of x-ray scattering spectra for warm dense matter.
abstract: We present calculations of x-ray scattering spectra based on ionic and electronic structure factors that are computed from a new model for warm dense matter. In this model, which has no free parameters, the ionic structure is determined consistently with the electronic structure of the bound and free states. The x-ray scattering spectrum is thus fully determined by the plasma temperature, density and nuclear charge, and the experimental parameters. The combined model of warm dense matter and of the x-ray scattering theory is validated against an experiment on room-temperature, solid beryllium. It is then applied to experiments on warm dense beryllium and aluminum. Generally good agreement is found with the experiments. However, some significant discrepancies are revealed and appraised. Based on the strength of our model, we discuss the current state of x-ray scattering experiments on warm dense matter and their potential to determine plasma parameters, to discriminate among models, and to reveal interesting and difficult to model physics in dense plasmas.
authors.affiliation: Department of Mathematics, University of Michigan, Ann Arbor, Michigan 48019, USA.
authors.forename: A N
authors.initials: AN
authors.lastname: Souza
authors.affiliation: Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA.
authors.forename: D J
authors.initials: DJ
authors.lastname: Perkins
authors.affiliation: Los Alamos National Laboratory, P. O. Box 1663, Los Alamos, New Mexico 87545, USA.
authors.forename: C E
authors.initials: CE
authors.lastname: Starrett
authors.affiliation: Los Alamos National Laboratory, P. O. Box 1663, Los Alamos, New Mexico 87545, USA.
authors.forename: D
authors.initials: D
authors.lastname: Saumon
authors.affiliation: Sandia National Laboratories, P. O. Box 5800, Albuquerque, New Mexico 87185, USA.
authors.forename: S B
authors.initials: SB
authors.lastname: Hansen
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D004583:Electrons; D008956:Models, Chemical; D058626:Plasma Gases / Q000737:chemistry* / Q000528:radiation effects*; D013052:Spectrometry, X-Ray Emission / Q000379:methods*
chemical_list: D058626:Plasma Gases