Detection of NMR signals with a radio-frequency atomic magnetometer |
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Authors: | Savukov I M Seltzer S J Romalis M V |
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Institution: | Department of Physics, Princeton University, Princeton, NJ 08544, USA. |
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Abstract: | We demonstrate detection of proton NMR signals with a radio-frequency (rf) atomic magnetometer tuned to the NMR frequency of 62 kHz. High-frequency operation of the atomic magnetometer makes it relatively insensitive to ambient magnetic field noise. We obtain magnetic field sensitivity of 7 fT/Hz1/2 using only a thin aluminum shield. We also derive an expression for the fundamental sensitivity limit of a surface inductive pick-up coil as a function of frequency and find that an atomic rf magnetometer is intrinsically more sensitive than a coil of comparable size for frequencies below about 50 MHz. |
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Keywords: | NMR Atomic magnetometer Radio-frequency Pick-up coil Sensitivity |
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