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Calculation of spectral and Rosseland paths in a plasma with multiply charged ions based on a statistical approach

  • Statistical, Nonlinear, and Soft Matter Physics
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Abstract

The semiclassical approach to determine the Fourier components of the electron dipole moment disregarding polarization (noninteracting electron model) is used for analyzing ion oscillator strengths and determining the radiation properties of plasmas consisting of multiply charged ions of heavy elements. The oscillator strength distribution df/dω (proportional to the photoabsorption cross section) is calculated as a function of the degree of ionization and self-similar frequency Ω = ω/Z. It is found that for low degrees of ionization, function df/dω for an ion is close to function df/dω for a neutral atom; upon an increase in the degree of ionization, regions are formed in which df/dω = 0 (transparency windows) and the photoabsorption cross section for high degrees of ionization differs from zero only in small frequency ranges. The resultant distribution of the ion oscillator strengths is used for calculating the polarizability of ions as a function of frequency and the cross section of radiation scattering on ions. For a gold plasma, the absorbance and opacity (both spectral and averaged according to Rosseland and Planck) are calculated. The results of computing the paths and absorption coefficients coincide in order of magnitude with the available data. The effect of scattering on the Rosseland path is estimated.

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Authors and Affiliations

  1. Russian Federal Nuclear Center, All-Russia Research Institute of Experimental Physics, Nizhni Novgorod oblast, Sarov, 607190, Russia

    S. F. Garanin & E. M. Kravets

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  1. S. F. Garanin
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  2. E. M. Kravets
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Correspondence to S. F. Garanin.

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Original Russian Text © S.F. Garanin, E.M. Kravets, 2012, published in Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2012, Vol. 142, No. 5, pp. 1052–1066.

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Garanin, S.F., Kravets, E.M. Calculation of spectral and Rosseland paths in a plasma with multiply charged ions based on a statistical approach. J. Exp. Theor. Phys. 115, 925–937 (2012). https://doi.org/10.1134/S1063776112100147

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  • DOI: https://doi.org/10.1134/S1063776112100147

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