High Gain Predictions for Ni-Like Ta Ions

Atomic structure data and effective collision strengths for 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ and 54 fine-structure levels are contained in the configurations 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁹ 4l (l=s, p, d, f) for the nickel-like Ta ion. These data are used in the determination of the reduced population for the 55 fine structure levels over a wide range of electron densities (from 10²¹ to 10²³) and at various electron plasma temperatures. The gain coefficients for those transitions with a positive population inversion factor are determined and plotted against the electron density.