Enhancement of SQUID-Detected NMR Signals with Hyperpolarized Liquid Xe129 in a 1 μT Magnetic Field

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

doi:10.1103/PhysRevLett.91.067601

← Back to search

Enhancement of SQUID-Detected NMR Signals with Hyperpolarized Liquid Xe129 in a 1 μT Magnetic Field

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

DOI 10.1103/PhysRevLett.91.067601 · Physical Review Letters

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

We report an enhancement of proton NMR signals by a factor of 106 by cross polarization with hyperpolarized liquid Xe129 in an ultralow magnetic field of 1 μT. The NMR signals from cyclopentane, acetone, and methanol are detected using a commercial high-Tc SQUID magnetometer with a signal-to-noise ratio of up to 1000 from a single 90° 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.