Journal
PHYSICAL REVIEW A
Volume 75, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.75.022507
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We report a precise determination of the static polarizability of the 8s(2)S(1/2) state of atomic cesium, carried out jointly through experimental measurements of the dc Stark shift of the 6s(2)S(1/2)-> 8s(2)S(1/2) transition using Doppler-free two-photon absorption and theoretical computations based on a relativistic all-order method. We enhance the precision of the measurement by imposing phase-modulation sidebands on the laser beam and by using a pair of vapor cells, one of which serves as a reference, and measuring the absorption spectrum in each cell with a single scan of the laser frequency. The measured value for the polarizability of the 8s state is 38,060 +/- 250a(0)(3), in very good agreement with our theoretical value of 38,260 +/- 290a(0)(3). In addition, the small difference in the Stark shift measurement for the two hyperfine states that we examine yields a variation in the polarizability due to the magnetic dipole contact interaction of 290 +/- 30a(0)(3).
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