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

Transition probabilities and oscillator strengths of 176 spectral lines with astrophysical interest arising from 5d(10)ns (n = 7,8), 5d(10)np (n = 6,7), 5d(10)nd (n = 6,7), 5d(10)5f, 5d(10)5g, 5d(10)nh (n = 6,7,8), 5d(9)6s(2), and 5d(9)6s6p configurations, and radiative lifetimes for 43 levels of Pb IV, have been calculated. These values were obtained in intermediate coupling (IC) and using relativistic Hartree-Fock calculations including core-polarization effects. For the IC calculations, we use the standard method of least-square fitting from experimental energy levels by means of the Cowan computer code. The inclusion in these calculations of the 5d(10)7p and 5d(10)5f configurations has facilitated a complete assignment of the energy levels in the Pb IV. Transition probabilities, oscillator strengths, and radiative lifetimes obtained are generally in good agreement with the experimental data. (C) 2010 Elsevier Inc. All rights reserved.