Abstract

Laser-induced fluorescence (LIF) and two-dimensional laser-induced fluorescence were used for measurement of the fluorescence lifetime of the AΣ+1 state of BaO molecules in the laser-ablation process of BaTiO3 and YBa2Cu3O7x in the oxygen background gas. The zero-pressure lifetime and the quenching rate were also determined as τ0=357 ns and k=5.1×10-6 ns-1 mTorr-1, respectively. The spatiotemporal changes of the collisional quenching of BaO molecules were successfully visualized, and the influence of the quenching on the spatial distribution imaging of BaO molecule was corrected.

© 1999 Optical Society of America

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