Radiative decay from the 7s(1/2) level in Pb+ and transition probabilities of astrophysical interest in Pb+ and Bi++

In the present work, we report on experimental and theoretical determination of the decay rates from the 7s(1)/2 state in singly ionized lead. Lifetime measurements performed using time-resolved laser-induced fluorescence spectroscopy and lifetime computations carried out with themulticonfiguration Dirac-Fock method allow us to solve the discrepancies previously observed between theory and experiment for this level. New transition probabilities are proposed for the two depopulation channels, i. e. the 6p(1/2-7s1/2) and 6p(3/2-7s1/2) transitions of astrophysical interest in Pb II and Bi III, respectively.