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

Transition probability for the line 2203.53 A of Pb II and transition probabilities for 39 lines of Pb I have been determined from measurements of emission line intensities in an optically thin laser-produced plasma of Pb and Sn in an atmosphere of Ar. Lines for which transition probabilities have not been previously published are included. In order to establish this homogeneity and the existence of local thermodynamic equilibrium, plasma has been 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. All rights reserved.