Theoretical wavelengths and transition probabilities for the 3d(9)-3d(8)4pand 3d(8)4s-3d(8)4p transition arrays in NiII

A complete tabulation of theoretical electric-dipole (E1) emission lines is presented for transitions between the 3d(9)-3d(8)4p and the 3d(8)4s-3d(8)4 p configurations of Ni II. For these configurations with an open d shell, w e applied extensive multiconfiguration Dirac-Fock wave functions to compute excitation energies, transition probabilities, and lifetimes. Our ab initi o data will be compared with available measurements and other calculations, where the overall agreement is seen to be satisfactory. Experimental data are still very scarce for these two transition arrays. Therefore, the prese nt data set not only supports the evaluation of the currently available dat a base, but may also help to identify or calibrate additional (less intense and intercombination) lines in the low-lying spectrum of Ni II. (C) 2000 A cademic Press.