Experimental determination of the shift of the Zeeman resonance frequency of cesium atoms induced by spin-exchange collisions with rubidium atoms

Abstract

s 2 -polarized pump light. The difference of the resonance frequencies measured in this manner was equal to double the magnitude (2d f 0) of the spin-exchange shift. We call attention to some procedural features of the experiment. First, because of its smallness, the observed shift 2d f 0 was measured by means of synchronous detection of the spin-exchange signal of cesium atoms with amplitude modulation of the constant magnetic field with frequency 10 Hz. For the s 2 -polarized rubidium pump light the frequency of the rf oscillator ~producing the alternating magnetic field which excited Zeeman transitions in the ground state of the Cs atoms! was tuned to the center of the magnetic resonance signal ~the minimum of the output voltage of the synchronous detector during differential passage through resonance! and the output voltage of the synchronous detector was recorded. Constant resonance conditions were maintained by stabilizing the magnetic field with a quantum magnetometer