Theoretical oscillator strengths, transition probabilities, and radiative lifetimes of levels in Pb V

Resumen

Theoretical values of oscillator strengths and transition probabilities for 306 spectral lines arising from the 5d⁹ ns (n=7,8,9), 5d⁹ np (n=6,7), 5d⁹6d, and 5d⁹ 5f configurations, and radiative lifetimes of 9 levels, of Pb V have been obtained. These values were obtained in intermediate coupling (IC) and using ab initio relativistic Hartree-Fock calculations including core-polarization effects. We use for the IC calculations the standard method of least squares fitting of experimental energy levels by means of computer codes from Cowan. We included in these calculations the 5d⁸6s6p and 5d⁸6s² configurations. These calculations have facilitated the identification of the 214.25,216.79, and 227.66 nm spectral lines of Pb V. In the absence of experimental results of oscillator strengths and transition probabilities, we could not make a direct comparison with our results. However, the Stark broadening parameters calculated from these values are in excellent agreement with experimental widening found in the literature.