Energy Levels, Oscillator Strengths and Forbidden Transition Probabilities in the Sc II Isoelectronic Sequence

Empirical Slater parameters are derived from a study of energy levels in the isoelectronic sequence Sc II –Ni IX . Positions for some unobserved levels are predicted. Electric dipole oscillator strengths have been calculated for all possible transitions. Electric quadrupole and magnetic dipole transitions between and within the $$3^{{d}^{2}}$$ and 3 ^d 4 s configurations are given.