Lifetime and oscillator-strength studies involving the (6s6p)3P1-(6s7s)1S0transition of atomic Yb

The oscillator strength of the (6s6p${)\mathrm{}}^3$ $P_1$-(6s7s${)\mathrm{}}^1$ $S_0$ transition and the lifetime of the (6s7s${)\mathrm{}}^1$ $S_0$ state in ${}_{}{}^{174}{}_{}{}^{}\mathrm{Yb}$ have been measured to be (8.0±1.6)×${10}^{\mathrm{-}4}$ and 45.8±1.0 nsec, respectively. The former value was obtained by use of coherent optical techniques (optical nutation and ac Stark splitting), while the latter was obtained by monitoring cascade fluorescence following pulsed excitation.