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Energies and lifetimes of the lowest 178 levels belonging to the 1 s 2 2 s 2 , 1 s 2 2 s 2 p , 1 s 2 2 p 2 , 1 s 2 2 s n l , and 1 s 2 2 p n l (n = 3 − 6 ; l = 0 − 5) configurations in Be-like hafnium and tantalum ions (Hf LXIX and Ta LXX) have been computed, as well as transition wavelengths, transition probabilities, line strengths, and weighted oscillator strengths of the electric/magnetic dipole (E1/M1) and electric/magnetic quadrupole (E2/M2) transitions between these levels. The calculations have been carried out using the GRASP2018 code through the multiconfiguration Dirac–Hartree–Fock (MCDHF) method with the Breit interaction and quantum electrodynamics (QED) corrections. The present results have been compared with previous data. Furthermore, the values of the last two active sets were compared to estimate the accuracy. • Comprehensive calculations of atomic data for Hf LXIX and Ta LXX. • The MCDHF method has been utilized through the GRASP2018 code. • The accuracy of atomic parameters has been estimated. [ABSTRACT FROM AUTHOR]

Energy levels, transition probabilities, oscillator strengths, line strengths, and lifetimes have been calculated for silicon-like manganese and germanium, Mn XII and Ge XIX. The configurations 3s23p2, 3s3p3, 3s23p3d, 3s3p23d, and 3p4 were used in the calculations and 88 fine-structure levels were obtained. The fully relativistic GRASP code has been adopted, and results are reported for all electric dipole, electric quadrupole, magnetic dipole, and magnetic quadrupole transitions among levels of Mn XII and Ge XIX. Comparisons have been made with available theoretical and experimental results. [ABSTRACT FROM AUTHOR]

Abstract: Energy levels, transition probabilities, oscillator strengths, line strengths, and lifetimes have been calculated for transitions in B-like Fe and Ga ions. The configurations 2s22p, 2s2p2, 2p3, , and were used in the calculations and 125 fine-structure levels were obtained. The fully relativistic GRASP code has been adopted, and results are reported for all electric dipole, electric quadrupole, magnetic dipole, and magnetic quadrupole transitions among the lowest 125 levels of Fe XXII and Ga XXVII, belonging to the configurations. Comparisons are made with earlier available theoretical results. [Copyright &y& Elsevier]

Abstract: Energy levels, transition probabilities, oscillator strengths, line strengths, and lifetimes have been calculated for Oxygen-like Gallium, Ga XXIV. The configurations 2s22p4, 2s2p5, 2p6, 2s2p4 , 2s22p3 , and 2p5 were used in calculations and 226 fine-structure levels were obtained. The fully relativistic GRASP code has been adopted, and results are reported for all electric dipole (E1), electric quadrupole (E2), magnetic dipole (M1), and magnetic quadrupole (M2) transitions among the lowest 226 levels of Ga XXIV, belonging to the configurations. Comparisons have been made with earlier available theoretical and experimental results. [Copyright &y& Elsevier]

Abstract: Energy levels, wavelengths, transition probabilities, and oscillator strengths have been calculated for Ge-like Kr, Mo, Sn, and Xe ions among the fine-structure levels of terms belonging to the ([Ar]3d10)4s24p2, ([Ar]3d10)4s4p3, ([Ar]3d10)4s24p4d, and ([Ar]3d10)4p4 configurations. The fully relativistic multiconfiguration Dirac–Fock method, taking both correlations within the complex and the quantum electrodynamic effects into account, have been used in the calculations. The results are compared with the available experimental and other theoretical results. [Copyright &y& Elsevier]