Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 1998, Vol. 9 ›› Issue (3): 129

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Radiation mean free path for non-LTE fully ionized medium

Zhang Jun   

  1. Institute of Applied Physics and Computational Mathematics, Beijing 100088
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Zhang Jun. Radiation mean free path for non-LTE fully ionized medium.Nuclear Science and Techniques, 1998, 9(3): 129

Abstract: Radiation mean free path (RMFP) is the function of radiation temperature, electron temperature and material density, and needs to apply Planck mean and Rosseland mean, respectively, in the regions of rarefaction wave and shock wave. The analytical formulae for the two kinds of RMFP have been given, by which the RMFP have been calculated for the interesting small atomic number Z. The calculated results show that the RMFP in non-localthermal-equilibrium (non-LTE) and in LTE are obviously different and Planck RMFP is 30 times less than Rosseland one.

Key words: Radiation mean free path, Radiation transportation, Non-local thermal equilibrium, Diffusion approximation