PROPENSITY RULES FOR RADIATIVE RATES OF HIGH-LYING DOUBLY-EXCITED STATES OF MULTIPLY-CHARGED HELIUM-LIKE IONS

The radiative dipole transitions between doubly excited states of mult icharged ions with large principal quantum numbers of both electrons ( n(1) and n(2)) are studied. On the basis of the analytical wavefunctio ns, being exact in the large n limit, the propensity rules for the rad iative rates of intrashell and intershell doubly excited states are fo und. It is shown that for all states near the lower edge of the (n(1), n(2)) manifold the propensity rules obtained are sufficient to isolat e the few dominant decay channels. The main features of partial and to tal radiative decay rates of intra- and intershell states are consider ed.