Radiative decays of then=2states of He-like ions

Abstract
The relativistic random-phase approximation (RRPA) is applied to study radiative transitions from n=2 states along the He isoelectronic sequence. The strengths of various decay modes and the energy splittings of the n=2 multiplets are investigated. At low Z the present results agree with earlier nonrelativistic studies, whereas, at high Z our results provide new information about oscillator strengths, branching ratios, and multiplet structure for the n=2 states.