We carried out molecular dynamics experiments to determine the reduced heat diffusion coefficient D ‫ء‬ th and the reduced thermal conductivity l ‫ء‬ of the three-dimensional classical electron one-component plasma, for the 1 # G # 20 range of the plasma coupling parameter G. In our simulations the temperature of the system was spatially modulated, and D ‫ء‬ th and l ‫ء‬ were calculated from the relaxation time of the temperature profile. D ‫ء‬ th was found to decrease with increasing G, while l ‫ء‬ decreased with increasing G for G # 4 (from l ‫ء‬ Х 2.3 at G 1.1 to l ‫ء‬ Х 0.6 at G 4) and was approximately constant (l ‫ء‬ Х 0.4) in the 8 # G # 20 range. [S0031-9007(98)06853-7]

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