High-field cross polarization NMR from laser-polarized xenon to surface nuclei
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A method for NMR investigations of surface nuclei using cross polarization from optically polarized xenon (OPCP) is described. We find this methodology results in enhancement factors of approximately 103 upon application to surface protons. The dynamics of129Xe transfer to protons is examined in some detail, including the time, temperature, and multiple contact dependences of signal intensities. Furthermore, we discuss the sensitivity of the transfer process to spatial diffusion. Finally, we report on application of the OPCP experiment to a low total surface area sample.
KeywordsXenon Aerosil Cross Polarization Free Induction Decay Xenon Atom
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