Frequency Shift in Magnetic Transitions between Hyperfine Levels of ²P_3⁄2 States of Cs¹³³

Abstract

By using the double resonance method, transitions F=5→F=4 and F=3→F=2 are measured for 7 ²P_3⁄2 and 8 ²P_3⁄2 states of Cs¹³³ atom (I=7⁄2). Frequency shifts proportional to the input power are observed. In order to compare with the experiment, the theory of frequency shift due to radiation is generalized to the case of transitions between degenerate levels. The result of the calculation is in good agreement with the experimental data.