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Title: Plasmon resonance in warm dense matter

Abstract

Collective Thomson scattering with extreme ultraviolet light or x-rays is shown to allow for a robust measurement of the free electron density in dense plasmas. Collective excitations like plasmons appear as maxima in the scattering signal. Their frequency position can directly be related to the free electron density. The range of applicability of the standard Gross-Bohm dispersion relation and of an improved dispersion relation in comparison to calculations based on the dielectric function in random phase approximation is investigated. More important, this well-established treatment of Thomson scattering on free electrons is generalized in the Born-Mermin approximation by including collisions. We show that, in the transition region from collective to non-collective scattering, the consideration of collisions is important.

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
946935
Report Number(s):
LLNL-JRNL-403004
TRN: US200904%%339
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Journal Article
Journal Name:
Physics Review Letters, vol. 78, N/A, August 21, 2008, pp. 026411-1 to 026411-8
Additional Journal Information:
Journal Volume: 78
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; APPROXIMATIONS; COLLECTIVE EXCITATIONS; DIELECTRIC MATERIALS; DISPERSION RELATIONS; ELECTRON DENSITY; ELECTRONS; PLASMONS; RANDOM PHASE APPROXIMATION; RESONANCE; SCATTERING; THOMSON SCATTERING

Citation Formats

Thiele, R, Bornath, T, Fortmann, C, Holl, A, Redmer, R, Reinholz, H, Ropke, G, Wierling, A, Glenzer, S H, and Gregori, G. Plasmon resonance in warm dense matter. United States: N. p., 2008. Web. doi:10.1103/PhysRevE.78.026411.
Thiele, R, Bornath, T, Fortmann, C, Holl, A, Redmer, R, Reinholz, H, Ropke, G, Wierling, A, Glenzer, S H, & Gregori, G. Plasmon resonance in warm dense matter. United States. https://doi.org/10.1103/PhysRevE.78.026411
Thiele, R, Bornath, T, Fortmann, C, Holl, A, Redmer, R, Reinholz, H, Ropke, G, Wierling, A, Glenzer, S H, and Gregori, G. 2008. "Plasmon resonance in warm dense matter". United States. https://doi.org/10.1103/PhysRevE.78.026411. https://www.osti.gov/servlets/purl/946935.
@article{osti_946935,
title = {Plasmon resonance in warm dense matter},
author = {Thiele, R and Bornath, T and Fortmann, C and Holl, A and Redmer, R and Reinholz, H and Ropke, G and Wierling, A and Glenzer, S H and Gregori, G},
abstractNote = {Collective Thomson scattering with extreme ultraviolet light or x-rays is shown to allow for a robust measurement of the free electron density in dense plasmas. Collective excitations like plasmons appear as maxima in the scattering signal. Their frequency position can directly be related to the free electron density. The range of applicability of the standard Gross-Bohm dispersion relation and of an improved dispersion relation in comparison to calculations based on the dielectric function in random phase approximation is investigated. More important, this well-established treatment of Thomson scattering on free electrons is generalized in the Born-Mermin approximation by including collisions. We show that, in the transition region from collective to non-collective scattering, the consideration of collisions is important.},
doi = {10.1103/PhysRevE.78.026411},
url = {https://www.osti.gov/biblio/946935}, journal = {Physics Review Letters, vol. 78, N/A, August 21, 2008, pp. 026411-1 to 026411-8},
number = ,
volume = 78,
place = {United States},
year = {Thu Feb 21 00:00:00 EST 2008},
month = {Thu Feb 21 00:00:00 EST 2008}
}

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