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Transitions from the ground states of fluorine-like ions

We present oscillator strengths of transitions between the levels of the ground state and those of the 2s2p6, 2s22p43s and 2s22p43d states for several fluorine-like ions: Mg IV, S VIII, Cl IX, Ti XIV, Fe XVIII and Ni XX. The wave functions are of fairly simple configuration interaction type, and have previously been used to describe target states in R-matrix calculations of excitation collision strengths. There is generally good agreement with the work of Fawcett (1984), but substantial improvements are made for the 2s22p5-2s2p6 transitions by a fuller treatment of electron correlation.