Lifetimes of 4p(5)4d Levels in Highly Ionized Atoms

Energy levels, lifetimes, and wave function compositions have been computed for all atomic states of the 4p(6) and 4p(5)4d configurations using the multiconfiguration Dirac-Hartree-Fock method. Calculations were done by parity and the configuration state function expansions were obtained by allowing single and double substitutions from the the 4p(6) and 4p(5)4d single references with orbitals in an orbital set that was extended to n = 7 and all possible angular symmetries. Lifetimes are computed from E1, E2, and M1 transitions between these levels. Energy levels and transition energies (or wavelengths) are compared with other theory and experiment, when available. Transition data for the 4p(6) (1)S0 - 4p(5) 4d J = 1 transitions are investigated in detail with respect to convergence of transition energies and the length and velocity forms of the line strengths. By classifying the upper states by J, parity (pi), and position, the compositions of the states with the same three quantum number change smoothly as a function of the nuclear charge Z and transition energies and transition matrix elements can be approximated by polynomial expressions in Z. A zero in the transition matrix element for the S-1(0) - P-3(1)o transition leads to a long lifetime at Z approximate to 58.