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Optics and Spectroscopy

General theory of magnetic resonance in a magnetic field periodic in time: resonance transitions between quasi-energy states of two-level atoms under optical pumping conditions

M. D. Anosov

Published Apr 1, 1981• 0 citations
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A generalized model for the magnetic resonance signal corresponding to the 0-0 hyperfine transition in an optically pumped alkali-metal vapor is presented. Under conditions of microwave power broadening, the model predicts ``anomalous'' light broadening and ``anomalous'' relaxation narrowing of the magnetic resonance linewidth. Good agreement between theory and experiment was obtained in an experiment that confirmed the prediction of anomalous light broadening. These results show that the 0-0 hyperfine transition cannot be described as a simple two-level system; rather, the alkali-atom's nuclear spin plays an important role in determining the magnetic resonance linewidth.