Fine-structure in 3d(4) states of highly charged Ti-like ions

A remarkable improvement of ab initio calculations was obtained for wavelen gths of (3d(4)) J = 3 --> 2 forbidden transition. Present calculations redu ced the long-standing discrepancy from measurements down to less than 0.2% for most high-Z titanium-like ions. In the present calculations, a large ex tent of configuration space was included so that most important many-body e ffects were taken into account. To this end, the linearized second-order Br illouin-Wigner perturbation theory was employed with optimized spin-orbital s. Transition probability and atomic g-factor were also calculated with the improved atomic wavefunctions.