Yu.S. Domnin¹, A.I. Magunov^{1, 2}, V.G. Palchikov^{1, 3}

¹FGUP “VNIIFTRI”, Mendeleevo, Moscow region, Russia
²A.M. Prokhorov Institute of General Physics of the Russian Academy of Sciences, Moscow, Russia
³National Research Nuclear University MEPhI, Moscow, Russia
palchikov@vniiftri.ru

Al’manac of Modern Metrology № 2 (30) 2022, pages 10–19

Abstract. The population evolution of sublevels of the hyperfine structure of the ¹³³Cs atom in laser fields is calculated taking into account resonant and nonresonant 6²S_1/2 F_f = 4 ↔ 6²P_3/2 Fe = 4,5 and 6²S_1/2 F_g = 3 ↔ 6²P_3/2 F_e = 4 transitions. Analytical expressions are obtained for the statio­nary populations of sublevels and the characteristic times of population stabilization depending on the intensity of the laser fields and the detuning of the optical resonance. It is shown that when the resonance is detuned F_f ↔ F_e = 4 by the value of the hyperfine shift relative to F_e = 5, a signify­cant fraction of atoms goes to the lower F_g sublevel in the absence of pumping at the F_g ↔ F_e = 4 resonant transition under the conditions of operation of a cloud of cold atoms and a recording system of a cesium frequency standard.

Keywords: cesium frequency standard, resonant laser fields, populations of HFS sublevels.

Full texts of articles are available only in Russian in printed issues of the magazine.