%0 Journal Article %J Chemical Physics Letters %D 1997 %T SQUID detected NMR of laser-polarized xenon at 4.2 K and at frequencies down to 200 Hz %A TonThat, D. M. %A Ziegeweid, M. %A Song, Y. Q. %A Munson, E. J. %A Appelt, S. %A Pines, A. %A Clarke, J. %K relaxation %X
A spectrometer based on a dc SQUID (superconducting quantum interference device) was used to record nuclear magnetic resonance signals from laser-polarized Xe-129 at 4.2 K and at frequencies ranging from about 200 Hz to 110 kHz in magnetic fields varying from about 0.02 to 9 mT. The Xe-129 resonance linewidths were found to increase with increasing magnetic field, and, at a given field, to increase with higher Xe-129 concentration. The spin-lattice relaxation times were observed to decrease from similar to 8000 s at 5 mT to similar to 2000 s at fields below 0.05 mT. Such long relaxation times make possible a variety of spin polarization transfer experiments. (C) 1997 Published by Elsevier Science B.V.
%B Chemical Physics Letters %V 272 %P 245-249 %8 Jun 27 %@ 0009-2614 %G English %U