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Title: Checking the Salpeter enhancement of nuclear reactions at intermediate coupling in asymmetric mixtures

Abstract

In this study, we investigate the plasma enhancement of nuclear reactions in the intermediate coupling regime using orbital free molecular dynamics (OFMD) simulations. Mixtures of H-Cu and H-Ag serve as prototypes of simultaneous weak and strong couplings due to the charge asymmetry. Of particular importance is the partial ionization of Cu and Ag and the free electron polarization captured by OFMD simulations. By comparing a series of OFMD simulations at various concentrations and constant pressure to multi-component hyper-netted chain (MCHNC) calculations of effective binary ionic mixtures, we set a general procedure for computing enhancement factors. The MCHNC procedure allows extension to very low concentrations (5% or less) and to very high temperatures (few keV) unreachable by the simulations. Lastly, enhancement factors for nuclear reaction rates extracted from the MCHNC approach are compared with the Salpeter theory in the weak and strong coupling regimes, and a new interpolation is proposed.

Authors:
ORCiD logo [1];  [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2];  [2]; ORCiD logo [2]
  1. CEA, DAM, DIF, Arpajon (France)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1530776
Report Number(s):
LA-UR-18-25309
Journal ID: ISSN 1070-664X
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 26; Journal Issue: 1; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Clérouin, Jean, Arnault, Philippe, Desbiens, Nicolas, White, Alexander J., Collins, Lee A., Kress, Joel D., and Ticknor, Christopher. Checking the Salpeter enhancement of nuclear reactions at intermediate coupling in asymmetric mixtures. United States: N. p., 2019. Web. doi:10.1063/1.5065464.
Clérouin, Jean, Arnault, Philippe, Desbiens, Nicolas, White, Alexander J., Collins, Lee A., Kress, Joel D., & Ticknor, Christopher. Checking the Salpeter enhancement of nuclear reactions at intermediate coupling in asymmetric mixtures. United States. doi:10.1063/1.5065464.
Clérouin, Jean, Arnault, Philippe, Desbiens, Nicolas, White, Alexander J., Collins, Lee A., Kress, Joel D., and Ticknor, Christopher. Fri . "Checking the Salpeter enhancement of nuclear reactions at intermediate coupling in asymmetric mixtures". United States. doi:10.1063/1.5065464. https://www.osti.gov/servlets/purl/1530776.
@article{osti_1530776,
title = {Checking the Salpeter enhancement of nuclear reactions at intermediate coupling in asymmetric mixtures},
author = {Clérouin, Jean and Arnault, Philippe and Desbiens, Nicolas and White, Alexander J. and Collins, Lee A. and Kress, Joel D. and Ticknor, Christopher},
abstractNote = {In this study, we investigate the plasma enhancement of nuclear reactions in the intermediate coupling regime using orbital free molecular dynamics (OFMD) simulations. Mixtures of H-Cu and H-Ag serve as prototypes of simultaneous weak and strong couplings due to the charge asymmetry. Of particular importance is the partial ionization of Cu and Ag and the free electron polarization captured by OFMD simulations. By comparing a series of OFMD simulations at various concentrations and constant pressure to multi-component hyper-netted chain (MCHNC) calculations of effective binary ionic mixtures, we set a general procedure for computing enhancement factors. The MCHNC procedure allows extension to very low concentrations (5% or less) and to very high temperatures (few keV) unreachable by the simulations. Lastly, enhancement factors for nuclear reaction rates extracted from the MCHNC approach are compared with the Salpeter theory in the weak and strong coupling regimes, and a new interpolation is proposed.},
doi = {10.1063/1.5065464},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 1,
volume = 26,
place = {United States},
year = {2019},
month = {1}
}

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