Restricted diffusion within a single pore

M E Hayden; G Archibald; K M Gilbert; C Lei

doi:10.1016/j.jmr.2004.05.002

Restricted diffusion within a single pore

J Magn Reson. 2004 Aug;169(2):313-22. doi: 10.1016/j.jmr.2004.05.002.

Authors

M E Hayden¹, G Archibald, K M Gilbert, C Lei

Affiliation

¹ Department of Physics, Simon Fraser University, Burnaby, BC, Canada V5A 1S6. [email protected]

PMID: 15261628
DOI: 10.1016/j.jmr.2004.05.002

Abstract

The time-dependent diffusion of 3Heatoms perpendicular to the axis of a single macroscopically large cylindrical pore is studied using a steady (or constant) gradient-recalled echo sequence. Measurements of the effective 3Hediffusion coefficient extending from the free-diffusion regime to the motionally averaged regime are presented, and are well-described by analytic solutions to the Bloch-Torrey equation based on the gaussian phase approximation. Our data yield the value 0.140(6)m2/s for the self diffusion coefficient of 3Heat a temperature of 296 K and a pressure of 1.00 Torr. Adaptations of these methods should enable the study of complex pore geometries as model systems.