Subfemtotesla radio-frequency atomic magnetometer for detection of nuclear quadrupole resonance

S. K. Lee, K. L. Sauer, S. J. Seltzer, O. Alem, M. V. Romalis

Research output: Contribution to journalArticlepeer-review

107 Scopus citations

Abstract

A radio-frequency tunable atomic magnetometer is developed for detection of nuclear quadrupole resonance (NQR) from room temperature solids. It has a field sensitivity 0.24 fT Hz12 at the 423 kHz N14 NQR frequency of ammonium nitrate. A potential application of the magnetometer is detection of nitrogen-containing explosives which is difficult with conventional tuned copper coils due to a poor signal-to-noise ratio (SNR) below a few megahertz. The NQR signal from 22 g of powdered ammonium nitrate located 2 cm away from the sensor is detected with a SNR of 9 in a 4.4-s -long multiple echo sequence, which represents an estimated order-of-magnitude improvement in sensitivity over the pickup coil detection.

Original languageEnglish (US)
Article number214106
JournalApplied Physics Letters
Volume89
Issue number21
DOIs
StatePublished - 2006

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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