We report time-correlated measurements of the lifetimes of the $7p{}^2{P}_{3/2}$ and $7p{}^2{P}_{1/2}$ states of atomic cesium. The results of these measurements are ${\tau }_{3/2}=137.54\left(16\right)$ ns and ${\tau }_{1/2}=165.21\left(19\right)$ ns. We use these lifetimes, together with other previously determined electric dipole matrix elements of ${}^{133}\mathrm{Cs}$, to determine the matrix elements $\langle 5d{}^2{D}_{5/2}\parallel r\parallel 7p{}^2{P}_{3/2}\rangle , \langle 5d{}^2{D}_{3/2}\parallel r\parallel 7p{}^2{P}_{3/2}\rangle$, and $\langle 5d{}^2{D}_{3/2}\parallel r\parallel 7p{}^2{P}_{1/2}\rangle$. These matrix elements are in good agreement with, but of higher precision than, calculated values of these same matrix elements.

• Received 10 September 2019

DOI:https://doi.org/10.1103/PhysRevA.100.052507