Abstract
Z-dependence of atomic properties for n = 3 excited states of highly charged neonlike ions was investigated theoretically for Z = 50–56. Configuration interaction effects for relativistic atomic states of three electric-dipole lines: 3D (3d5/2 → 2p3/2), 3E (3d3/2 → 2p3/2) and 3F (3s1/2 → 2p1/2), were examined in terms of jK-coupling. A present collisional-radiative model consistently explained intensity ratios for 3F/3D observed with the Tokyo-EBIT, and predicted a vanishing intensity for the 3E line near Z = 52. The vanishing intensity for the 3E line was attributed to the Cooper-minimum type mechanism.
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