Radiative lifetimes of excitedpstates of Na

Using a laser-cascade fluorescence technique, we have measured the radiative lifetimes of the $n=4\mathrm{to}7 p$ states of Na. The $\mathrm{}(4-7)p$ lifetimes are 125(12) nsec, 345(43) nsec, 0.89(9) μsec, and 1.45(10) μsec. These results are in qualitative agreement with calculated values.