Radiation from a hot, thin plasma from 1 to 250 A

Astronomy and Astrophysics – Astrophysics

Scientific paper

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High Temperature Plasmas, Plasma Radiation, Plasma Spectra, Rarefied Plasmas, X Ray Spectra, Abundance, Bremsstrahlung, Electron Scattering, Emission Spectra, Plasma Density, Radiative Recombination

Scientific paper

A calculation of the emission spectrum of a hot low-density plasma in the region 1-250 A is presented. The mechanisms considered are electron collision-induced line emission, bremsstrahlung, and radiative recombination; the temperature range studied is 100,000 to 10 million K. A total of 795 lines is included. The elemental abundances of the ions of He, C, N, O, Ne, Mg, Si, S, Ca, Fe, and Ni were taken to be as in the solar corona. The line emission of Fe ions produces a maximum in the curve of an emission power between 1 and 250 A versus temperature around 1 million K. The emission rate around this temperature is larger than previously calculated results.

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