Narrow Pulse Effects and Tortuosity Studies in Porous Media using Xenon Diffusion NMR

Details Narrow Pulse Effects and Tortuosity Studies in Porous Media using Xenon Diffusion NMR Narrow Pulse Effects and Tortuosity Studies in Porous Media using Xenon Diffusion NMR

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002ismr.proc.2007m&link_type=abstract

Proceedings of the Tenth Scientific Meeting of the International Society for Magnetic Resonance in Medicine, Honolulu, HI, 2002,

Physics

Scientific paper

With the advent of laser-polarized gases, measurement of gaseous diffusion in restricted environments is gaining wider interest. We report a systematic study of xenon gas diffusion in random packs of mono-sized glass beads, focusing on: (i) diffusion of spins on the order of the pore dimensions during the diffusion encoding gradient pulses, and (ii) the ability to derive long-length scale structural information. We find that the observed normalized time-dependent diffusion coefficient, D(t)/D0, of the xenon gas at short diffusion times can be significantly influenced by the gas pressure and the presence of background gradients.

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