Multiple-quantum radio-frequency spectroscopy of atoms: Application to the metrology of geomagnetic fields
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The evolution of the radio-frequency magnetic resonance spectrum of optically oriented potassium atoms in terrestrial magnetic fields as a function of the amplitude of the alternating magnetic field H1 is investigated theoretically and experimentally. It is shown that among the set of observed n-quantum resonances which satisfy the selection rules ΔF=0 and ΔmF±n (n is an integer), there is one resonance with the highest multiplicity n=4 (mF=2⇔mF=−2), which has exceptional properties. These qualities make this resonance a candidate for use in a weak-field quantum magnetometer with record-high characteristics. A preliminary investigation of an experimental model of a four-quantum potassium magnetometer is performed.
KeywordsSpectroscopy Magnetic Field Potassium Experimental Model Selection Rule
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