Relativistic excitation energies and transition data for Ag XLIV and Cd XLV

Abstract

Excitation energies, LS-compositions, and lifetimes for the 184 fine-structure levels related to the 2s2, 2p2, 2snl (n = 3 − 6; l = 0 − 4), and 2pnl (n = 3 − 5; l = 0 − 4) configurations as well as transition data for the electric/magnetic-dipole (E1/M1) and electric/magnetic-quadrupole (E2/M2) transitions between these levels are calculated for Be-like Ag XLIV and Cd XLV. The GRASP2018 atomic structure computer package, which is based on the multiconfiguration Dirac-Hartree-Fock (MCDHF) method, is used to perform the present computations. The Breit interaction and quantum electrodynamics (QED) effects are included in the relativistic configuration interaction (RCI) computations. The convergence of excitation energies for various active sets is discussed and the discrepancy between the present energies and oscillator strengths with other theoretical results is graphically illustrated. The uncertainty estimation of the present results for lifetimes and line strengths is performed by comparing the two active sets of the present MCDHF calculations.