Stark Effect on Cesium-133 Hyperfine Structure

Abstract

A S a continuation of the high-precision atomic hyperfine-structure measurements made in this laboratory in recent years, the effect of an electric field on the hyperfine-structure energy levels of Cs 133 has been examined.The increase A(< §) of the (F=4, m F =0)^(F=3 y m F = 0) transition frequency (for the ground state of Cs 133 ) has been measured in electric fields between zero and 6.7 X10 4 volts/cm by the atomic-beam magnetic-resonance technique. The transition frequency for zero electric and magnetic fields is 1 9 192 631 830=1= 10 cps. The maximum observed shift of this transition frequency caused by the electric field was approximately 4X10 3 cps. The line widths for the resonance curves obtained in these measurements were approximately 120 cps. The (4, 0)<-»(3, 0) transition was induced by using the Ramsey two-transition-region method, 2 with two microwave cavities separated by a distance L T i = 78.4 cm along the beam. The electric field was obtained with a parallel-plate condenser of length L s =66.0 cm, located between the two cavities. A crystal-stabilized klystron was used as the microwave source.

Frequency Shift of the Cesium Clock Transition due to Blackbody Radiation

“…There is some disagreement on the value of this shift. Early measurements [2,4,7] and ab initio calculations [5,8] support a value which is close to −2.2 × 10 −10 Hz/(V/m) 2 while more recent measurements [10,11] and semiempirical calculations [3,9,12] claim that actual number might be about 10% smaller.In the present work we have performed fully ab initio calculations of the radiation frequency shift and have identified the source of the disagreement between different theoretical results as the contribution of the continuum spectrum states into summation over the complete set of intermediate states. The continuum spectrum was included in all the ab initio calculations and missed in the semiempirical considerations.…”

“…There is some disagreement on the value of this shift. Early measurements [2,4,7] and ab initio calculations [5,8] support a value which is close to −2.2 × 10 −10 Hz/(V/m) 2 while more recent measurements [10,11] and semiempirical calculations [3,9,12] claim that actual number might be about 10% smaller.…”

“…First, we calculate it in the lowest, second-order of the many-body perturbation theory (MBPT). We use notationΣ (2) for the corresponding correlation potential. Then we also include intoΣ two classes of the higherorder terms: screening of the Coulomb interaction and hole-particle interaction (see, e.g.…”

“…To calculateΣ (2) we need a complete set of singleelectron orbitals. We use the B-spline technique [18,19] to construct the basis.…”

Measurement of the scalar third-order electric polarizability of the Cs ground state using coherent-population-trapping spectroscopy in Ramsey geometry

“…The individual results and their average value are presented in Fig. 17, together with past experimental [4,5,30,31] and theoretical [9,10] values. For a comparison with more previous results, we refer the reader to Fig.…”