Energy levels for configurations 3p63d94l, 3p53d104l (l=1-3) (Z=36-56) and radiative transition probabilities to the ground state in Ni-like ions. Application to X-ray lasers modeling I

Relativistic perturbation theory with model potential of zero approximation is used for calculation of the energy levels 3p(6)3d(9)4l, 3p(5)3d(10)4l (l=1-3) of Ni-like ions with Z=36-56. The known ionization potentials of Ni-like ions used in calculations are corrected here. The dipole and quadrupole electric and magnetic probabilities of radiative transitions to the ground state are presented in graphs. It is shown that in the point of crossing of levels of the same parity and the same J a strong interaction of these levels occurs, which leads to a redistribution of the oscillator strengths of the radiative transitions from these levels. The crossing of energy levels of the opposite parities 3p(5)3d(10)4s [J=0], 3p(5)3d(10)4p [J=1] in Sn XXIII is shown. (C) 2021 Elsevier Inc. All rights reserved.