Kinetics of a laser-pumped barium vapour. II. Experiments and calculations

For pt.I see ibid., vol.22, no.10, p.1691-704 (1989). The kinetic processes of a laser-pumped barium vapour are analysed by the adjustment of model calculations to various experimental data. The authors consider temporally resolved measurements of population densities of low-lying Ba states, the ionisation, and the stimulated infrared emission. Furthermore, the radiative transfer laterally out of the vapour column and the transmitted fraction of the laser pulse are investigated. In the analysis of the laser pulse are investigated. In the analysis of the relevant processes, emphasis is laid on the population transfer from the pumped state to lower-lying states and on a detailed description of the ionisation mechanism. The connection of experimental data with model calculations makes it possible for the first time to determine a number of collisional cross sections for the inelastic scattering of electrons, rare-gas atoms and barium atoms with excited barium atoms.

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