Comment on element fractionation in the solar atmosphere driven by ionization-diffusion processes |
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| Authors: | McKenzie JF |
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| Institution: | (1) School of Pure and Applied Physics, University of Natal, Durban, South Africa;(2) Max-Planck-Institut für Aeronomie, Lindau, Germany |
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| Abstract: | It is emphasized that one-dimensional, steady-state models of a photoionization layer in which incoming photon fluxes ionize neutral particle fluxes cannot give rise to enhancements or depletions of one element over another. The so-called fractionation mechanism proposed by Marsch, von Steiger, and Bochler (1995) and Peter (1996, 1998) is shown to be a fallacy arising from applying an incorrect boundary condition at an arbitrary point. |
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