NMR OF SUPERCRITICAL LASER-POLARIZED XENON

The feasibility of producing supercritical laser-polarized xenon for n uclear magnetic resonance (NMR) investigations was studied. Using a hi gh-pressure capillary tube, a supercritical xenon sample (52 degrees C , 65 atm) was produced with a Xe-129 polarization approximately 140 ti mes the equilibrium value. The polarization was observed to last for h undreds of seconds, in agreement with previous studies. These prelimin ary results suggest that supercritical laser-polarized xenon may be us ed as a polarizing solvent for numerous NMR applications. (C) 1998 Pub lished by Elsevier Science B.V. All rights reserved.