Abstract

Abstract The extreme ultraviolet (EUV) spectrum of a Boron-like Ca ion was simulated by using a relativistic multi-configuration atomic package. As compared to previous work [Keenan et al.(1998)], the present study involved indirect processes, such as collision ionization, radiative recombination, dielectronic recombination, and resonance excitation from or to Beryllium-like and Carbon-like Ca ions. The effects of these processes were using three models, named one-, two-, and three-ion. We have found that these indirect processes are important to simulate the EUV spectrum of the Boron-like Ca ion, which will affect the diagnostics of astronomical and laboratory plasmas.

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