Models of the elastic x-ray scattering feature for warm dense aluminum
Abstract
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.
- Authors:
-
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1247299
- Alternate Identifier(s):
- OSTI ID: 1213946
- Report Number(s):
- LA-UR-15-23901
Journal ID: ISSN 1539-3755; PLEEE8
- Grant/Contract Number:
- AC52-06NA25396
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
- Additional Journal Information:
- Journal Volume: 92; Journal Issue: 3; Journal ID: ISSN 1539-3755
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; density functional theory; ionic structure; x-ray scattering; warm dense matter
Citation Formats
Starrett, Charles Edward, and Saumon, Didier. Models of the elastic x-ray scattering feature for warm dense aluminum. United States: N. p., 2015.
Web. doi:10.1103/PhysRevE.92.033101.
Starrett, Charles Edward, & Saumon, Didier. Models of the elastic x-ray scattering feature for warm dense aluminum. United States. https://doi.org/10.1103/PhysRevE.92.033101
Starrett, Charles Edward, and Saumon, Didier. 2015.
"Models of the elastic x-ray scattering feature for warm dense aluminum". United States. https://doi.org/10.1103/PhysRevE.92.033101. https://www.osti.gov/servlets/purl/1247299.
@article{osti_1247299,
title = {Models of the elastic x-ray scattering feature for warm dense aluminum},
author = {Starrett, Charles Edward and Saumon, Didier},
abstractNote = {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.},
doi = {10.1103/PhysRevE.92.033101},
url = {https://www.osti.gov/biblio/1247299},
journal = {Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics},
issn = {1539-3755},
number = 3,
volume = 92,
place = {United States},
year = {Thu Sep 03 00:00:00 EDT 2015},
month = {Thu Sep 03 00:00:00 EDT 2015}
}
Web of Science
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Works referencing / citing this record:
Measurement of ionic structure in isochorically heated graphite from X-ray Thomson scattering
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