Lifetimes and transition moments among excited electronic states of BaO

The lifetime of the BaO C 1Σ+ state is investigated for several vibrational and rotational levels at 1 Torr and under molecular beam conditions. A collision free radiative lifetime of 10.5±1 nsec is observed for the v=0 level. Dispersed fluorescence from v=0, 1, and 2 to various low lying electronic states is measured and used to obtain electronic dipole transition moments of : μ2C–X=9.9 D2, μ2C–A=16.8 D2, μ2C–A′=9.8 D2, μ2C–b=3.1 D2, μ2A–X=3.2 D2, μ2A′–X=0.14 D2.