Measurement of the hyperfine coupling constants and absolute energies of the $8p \ ^2P_{1/2}$ and $8p \ ^2P_{3/2}$ levels in atomic cesium

Abstract

We report measurements of the hyperfine coupling constant for the $8p \ ^2P_{1/2}$level of atomic cesium,$^{133}$Cs, with a relative uncertainty of$\sim$0.019\%. Our result is$A = 42.933 \: (8)$MHz, in good agreement with recent theoretical results. We also examine the hyperfine structure of the$8p \ ^2P_{3/2}$state, and derive new values for the state energies of the$8p \ ^2P_{1/2}$and$8p \ ^2P_{3/2}$ states of cesium.Comment: 8 pages, 7 figures, 5 table