A time-dependent close-coupling method for three-electron atomic systems is formulated to calculate the double autoionization of hollow-atom states. Initial excited states are obtained by relaxation of the Schrödinger equation in imaginary time, while autoionization rates are obtained by propagation in real time. A 12-coupledchannels nonperturbative calculation on a three-dimensional radial lat...

Excitation energies of the ns1/2 (n= 7-10), npj (n = 7-9), ndj (n= 6-8), nfj (n= 5-7), and ngj (n= 5-6) states in Th IV are evaluated. First-, second-, third-, and all-order Coulomb energies and firstand second-order Coulomb-Breit energies are calculated. Reduced matrix elements, oscillator strengths, transition rates, and lifetimes are determined for the 96 possible nlj−n′l′ j′ electric-dipole...