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.
Original language | English (US) |
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Pages (from-to) | 214-220 |
Number of pages | 7 |
Journal | Journal of Magnetic Resonance |
Volume | 185 |
Issue number | 2 |
DOIs | |
State | Published - Apr 2007 |
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Nuclear and High Energy Physics
- Biophysics
- Biochemistry
Keywords
- Atomic magnetometer
- NMR
- Pick-up coil
- Radio-frequency
- Sensitivity