Fig. 1.
Energy levels of the ground configurations for the Si+, Si2+, and Si3+ ions in addition to energy levels of the 3s13p13d1, 3s13p14s1, 3s13p14p1, 3s13p14d1, and 3s13p14f1 configurations. The first excited configuration of Si2+ is also presented. The red represents even configurations and the blue represents odd configurations.
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