Experimentally determined transition probabilities for lines of PbI and the 2203.5 angstrom line of PbII

Transition probability for the line 2203.53 A of Pb II and transition proba bilities for 39 lines of Pb I have been determined from measurements of emi ssion line intensities in an optically thin laser-produced plasma of Pb and Sn in an atmosphere of Ar. Lines for which transition probabilities have n ot been previously published are included. In order to establish this homog eneity and the existence of local thermodynamic equilibrium, plasma has bee n studied. A temperature of 11060 K and an electron density of 10(16) cm(-3 ) were found. The results were compared with the available experimental and theoretical data given by other authors. (C) 2001 Elsevier Science Ltd. Al l rights reserved.