Keywords :
atomic data - line formation - ISM: abundances - ultraviolet: general
Abstract:This paper reports R-matrix calculations of electron impact excitation rates for Ni III. The calculation includes 70 LS terms corresponding to the configurations 3d^8^, 3d^7^4s, 3d^7^4p, and 3d^6^4s^2^. This expansion results in 162 fine structure levels and 13041 transitions, including optical, infrared, and ultraviolet lines. The collision strengths, including detailed resonance structures, were integrated over a Maxwellian distribution of electron energies and the resulting effective collision strengths are given for a wide range of temperatures. A collisional-radiative equilibrium model of the Ni III ion is constructed and the strongest lines in the optical and infrared spectral regions are identified. The emissivities of these lines and
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