Measurement of the hyperfine coupling constants and absolute energies of the 12s ²S_1/2, 13s ²S_1/2, and 11d ²D_J levels in atomic cesium

We report measurements of the absolute energies of the hyperfine components of the 12s ²S_1/2 and 13s ²S_1/2 levels of atomic cesium, ¹³³Cs. Using the frequency difference between these components, we determine the hyperfine coupling constants for these states, and report these values with a relative uncertainty of ∼0.06%. We also examine the hyperfine structure of the 11d ²D_J (J = 3/2, 5/2) states, and resolve the sign ambiguity of the hyperfine coupling constants from previous measurements of these states. We also derive new, high precision values for the state energies of the 12s ²S_1/2, 13s ²S_1/2 and 11d ²D_J states of cesium.