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We report measurements of the absorption strength of the cesium $6s \:^2S_{1/2} \rightarrow 7p \: ^2P_{3/2} $ and the $6s \: ^2S_{1/2} \rightarrow 7p\: ^2P_{1/2} $ transitions at $\lambda = 456$ nm and 459 nm, respectively, inan atomic vapor cell. By simultaneously measuring the absorption strength onthe Cs D$_1$ line ($6s \: ^2S_{1/2} \rightarrow 6p \: ^2P_{1/2} $), for whichthe electric dipole transition moment is precisely known, we are able todetermine the reduced dipole matrix elements for these two lines. We report$\langle 7P_{3/2} || r || 6S_{1/2} \rangle = 0.5780 \: (7) \: a_0$ and $\langle7P_{1/2} || r || 6S_{1/2} \rangle = 0.2789 \: (16) \: a_0$, with fractionaluncertainties of 0.12% and 0.6%, respectively. Through these measurements, wecan reduce the discrepancy between values of the tensor polarizability for theCs $6s \: ^2S_{1/2} \rightarrow 7s \: ^2S_{1/2} $ transition that have beendetermined through two different methods.

Measurement of the radial matrix elements of the $6s \: ^2S_{1/2} \rightarrow 7p \: ^2P_{J} $ transitions in atomic cesium