NMR instabilities and spectral clustering in laser-polarized liquid xenon

Abstract : To study how highly magnetized liquids behave in NMR experiments, we have performed low field NMR on laser-polarized liquid 129Xe, with nuclear polarization of up to 6%. Contrary to conventional NMR results, we find that instabilities develop after a large pulse, leading to an unexpectedly abrupt decay of the signal. In contrast, the NMR spectrum after a small pulse collapses to a series of unusually sharp lines (spectral clustering), whose widths correspond to precession lifetimes longer than a half minute. We discuss the key role of long-range dipolar coupling in such spin dynamics.
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Submitted on : Sunday, October 3, 2004 - 5:20:20 PM
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Karen Sauer, François Marion, Pierre-Jean Nacher, Geneviève Tastevin. NMR instabilities and spectral clustering in laser-polarized liquid xenon. Physical Review B : Condensed matter and materials physics, American Physical Society, 2001, 63, pp.184427. ⟨hal-00002995⟩

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