Abstract
We report NMR measurements of hyperpolarized xenon dissolved in liquid nitrogen. The dependence of the ${}^{129}\mathrm{Xe}$ frequency shift on liquid nitrogen temperature was measured along the nitrogen saturated vapor curve from 77 to 93 K. Plotted as a function of the liquid nitrogen density, the chemical shift of xenon is very well described by a simple proportionality relation, with a slope of 0.2135(15) ppm/amagat. The relationship between the chemical shift and the longitudinal spin relaxation is considered in terms of the spin-rotation interaction, and estimates of Xe relaxation time in liquid nitrogen are discussed.
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