The use of UV photoelectron spectroscopy to monitor production of excited states of atomic lead from the

Production of the first (3P1) and second (3P2) excited states of atomic lead from the near-resonant Pb(3P0) + O2(a1Δg) reaction has been observed by UV photoelectron spectroscopy (p.e.s.). An intermediate coupling model has been developed to convert relative photoelectron band intensities of atomic lead into relative atomic state populations. The maximum lead excited state populations observed corresponded to relative 3P0: 3P1: 3P2 concentrations of 100: 10.2: 2.6 and ways are suggested in which the excited state concentrations can be increased. It has been shown that p.e.s. is a straightforward way of monitoring production of atomic excited states from a chemical reaction.