Models of the elastic x-ray scattering feature for warm dense aluminum

Starrett, Charles Edward; Saumon, Didier

doi:10.1103/PhysRevE.92.033101

Models of the elastic x-ray scattering feature for warm dense aluminum

Journal Article · Thu Sep 03 00:00:00 EDT 2015 · Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics

DOI:https://doi.org/10.1103/PhysRevE.92.033101· OSTI ID:1247299

Starrett, Charles Edward ^[1]; Saumon, Didier ^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

The elastic feature of x-ray scattering from warm dense aluminum has recently been measured by Fletcher et al. [Nature Photonics 9, 274 (2015)] with much higher accuracy than had hitherto been possible. This measurement is a direct test of the ionic structure predicted by models of warm dense matter. We use the method of pseudoatom molecular dynamics to predict this elastic feature for warm dense aluminum with temperatures of 1–100 eV and densities of 2.7–8.1g/cm³. We compare these predictions to experiments, finding good agreement with Fletcher et al. and corroborating the discrepancy found in analyses of an earlier experiment of Ma et al. [Phys. Rev. Lett. 110, 065001 (2013)]. Lastly, we also evaluate the validity of the Thomas-Fermi model of the electrons and of the hypernetted chain approximation in computing the elastic feature and find them both wanting in the regime currently probed by experiments.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1247299

Alternate ID(s):: OSTI ID: 1213946

Report Number(s):: LA-UR--15-23901

Journal Information:: Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics, Journal Name: Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics Journal Issue: 3 Vol. 92; ISSN 1539-3755; ISSN PLEEE8

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Ionic Transport Coefficients of Dense Plasmas without Molecular Dynamics Daligault, Jérôme; Baalrud, Scott D.; Starrett, Charles E. Physical Review Letters, Vol. 116, Issue 7 https://doi.org/10.1103/physrevlett.116.075002	journal	February 2016
Unified Concept of Effective One Component Plasma for Hot Dense Plasmas Clérouin, Jean; Arnault, Philippe; Ticknor, Christopher Physical Review Letters, Vol. 116, Issue 11 https://doi.org/10.1103/physrevlett.116.115003	journal	March 2016

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