2010MNRAS.401.1080A

Using a semi-empirical approach, we report in this paper calculated values of the Stark broadening parameters for 58 lines of Pbiv. They were calculated using a set of wavefunctions obtained from Hartree-Fock relativistic calculations including core polarization effects. Stark widths for 58 lines of Pbiv arising from 5d¹⁰ns (n = 7, 8), 5d¹⁰6p, 5d⁹6s6p, 5d¹⁰nd (n = 6, 7), 5d¹⁰5g and 5d¹⁰nh (n = 6, 7) configurations have been calculated in this way. Stark widths and shifts are presented for an electron density of 10¹⁷/cm3and temperatures T = 11000-200000 K. These atomic data are relevant to the analysis of Pbiv detected in Far Ultraviolet Spectroscopic Explorer spectra of hot subdwarf B stars and are used to determine the lead abundance of the early B main-sequence star AV 304 in the Small Magallanic Cloud by measuring the 1313.1 Å resonance line. Common trends for the Stark width of the resonance lines have been found and are discussed.