Two-photon spectroscopy of the 6S_1/2 → 6D_5/2 transition of trapped atomic cesium

Abstract
Two-photon spectroscopy of atomic cesium confined and cooled in a magneto-optical trap is reported. The hyperfine structure of the 6D5/2 state is determined with 1% accuracy. New capabilities for studying ac Stark shifts and kinetic transport for cold atoms are suggested.