Detection of NMR signals with a radio-frequency atomic magnetometer

Details Detection of NMR signals with a radio-frequency atomic magnetometer Detection of NMR signals with a radio-frequency atomic magnetometer

2006-11-06

arxiv.org/abs/physics/0611058v1

Physics

Atomic Physics

7 pages

Scientific paper

10.1016/j.jmr.2006.12.012

We demonstrate detection of proton NMR signals with a radio frequency 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/Hz$^{1/2}$ 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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