HIGH-FIELD CROSS-POLARIZATION NMR FROM LASER-POLARIZED XENON TO SURFACE NUCLEI

A method for NMR investigations of surface nuclei using cross polariza tion from optically polarized xenon (OPCP) is described. We find this methodology results in enhancement factors of approximately 10(3) upon application to surface protons. The dynamics of Xe-129 transfer to pr otons is examined in some detail, including the time, temperature, and multiple contact dependences of signal intensities. Furthermore, we d iscuss the sensitivity of the transfer process to spatial diffusion. F inally, we report on application of the OPCP experiment to a low total surface area sample.