Enhancement of SQUID-Detected NMR Signals with Hyperpolarized Liquid [Formula presented] in a [Formula presented] Magnetic Field

J. J. Heckman, M. P. Ledbetter, M. V. Romalis

Research output: Contribution to journalArticle

Abstract

We report an enhancement of proton NMR signals by a factor of [Formula presented] by cross polarization with hyperpolarized liquid [Formula presented] in an ultralow magnetic field of [Formula presented]. The NMR signals from cyclopentane, acetone, and methanol are detected using a commercial high-[Formula presented] SQUID magnetometer with a signal-to-noise ratio of up to 1000 from a single [Formula presented] tipping pulse. This technique allows a wide range of low-field NMR measurements and is promising for the detection of intermolecular scalar spin-spin couplings. Scalar intermolecular couplings can produce a shift of the average NMR frequency in a hyperpolarized sample even in the presence of rapid chemical exchange.

Original languageEnglish (US)
JournalPhysical review letters
Volume91
Issue number6
DOIs
StatePublished - Aug 5 2003

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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