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Abstract
We investigate the influence of various ionic structure models on the interpretation of the X-ray Thomson scattering signal. For the calculation of the ion structure, classical hypernetted chain equations are used applying different effective inter-particle potentials. It is shown that the different models lead to significant discrepancies in the theoretically predicted weight of the Rayleigh peak, in particular for small k-values where correlation effects are important. Here, we propose conditions which might allow for an experimental verification of the theories under consideration of experimental constraints of k-vector blurring.
Highlights
The availability of high-energy laser facilities, in particular the National Ignition Facility (NIF) at the Lawrence Livermore National Laboratory, USA, makes it nowadays possible to create highly compressed matter with densities exceeding solids and moderate to high temperatures [1]
We investigate the influence of various ionic structure models on the interpretation of the X-ray Thomson scattering signal
It is shown that the different models lead to significant discrepancies in the theoretically predicted weight of the Rayleigh peak, in particular for small k-values where correlation effects are important
Summary
The availability of high-energy laser facilities, in particular the National Ignition Facility (NIF) at the Lawrence Livermore National Laboratory, USA, makes it nowadays possible to create highly compressed matter with densities exceeding solids and moderate to high temperatures [1] Materials under these conditions possess properties which are common to solids, fluids and plasmas [2]. We concentrate on the elastic scattering feature that contains information on the ionic subsystem, such as ion density, ion temperature and charge state To extract these parameters from the scattering signal, an excellent theoretical description of all quantities involved is required, as the theoretically generated spectrum is fitted to the experimental measured profile.
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