Semi-empirical determination of radiative lifetimes for Sc II and Ti II

- Semi-empirical method of determination of the oscillator strengths.
- Comparison of experimental and calculated values of the radiative lifetimes for Sc II and Ti II.
- Predicted values of radiative lifetimes.

The aim of this paper is to determine the radiative lifetimes of selected levels for Sc II and Ti II based on the results of a semi-empirical oscillator strengths parametrization. The calculated values of the lifetimes are, in the majority of cases, in very good agreement with accurate experimental data. Moreover, the predicted values of the radiative lifetimes will be useful in case when the experimental values are not known.