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Spectroscopic Diagnostics for Ions Observed in Solar and Cosmic Plasmas

Published online by Cambridge University Press:  12 April 2016

Helen E Mason
Helen E Mason*
Affiliation:
Department of Applied Mathematics and Theoretical Physics, Silver Street, Cambridge, CB3 9EW, U. K.

Abstract

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The X-ray wavelength region (1-200Å) is rich in spectral lines from highly ionised systems. Spectra from the solar atmosphere have been studied extensively with various instruments covering different wavelength regions. In this paper, we discuss the solar spectral line emission with particular reference to iron ions and helium like ions observed during solar flares. The atomic processes involved in the calculation of theoretical intensities for low density plasmas are outlined together with the diagnostic properties of the emission lines. Comparisons are made with available cosmic X-ray spectra and predicted spectra for future projects, such as AXAF.

Type
1. X-rays from a Hot Plasma
Information
International Astronomical Union Colloquium , Volume 115: High Resolution X-ray Spectroscopy of Cosmic Plasmas , 1990 , pp. 11 - 20
Copyright
Copyright © Cambridge University Press 1990

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