Lifetime measurements of excited molecular states using a Ti:sapphire laser

A time resolved experiment on the lowest lying states of barium fluoride has been performed by applying laser resonance methods in the near infrared and green-blue wavelength regions. The A2Π and B2Σ+ states have been examined using Ti:sapphire laser excitations in the 710–850 nm wavelength region. The C2Π state was examined using the 496·5 nm Ar+ laser line and the lifetime of this state was in accordance with earlier measurements. The lifetimes obtained for the BaF molecule were: A2Π3/2, 46·1 ± 0·9 ns; B2Σ+, 41·7 ± 0·3 ns.