COMMENT ON ELEMENT FRACTIONATION IN THE SOLAR ATMOSPHERE DRIVEN BY IONIZATION-DIFFUSION PROCESSES


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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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