Effects of surface relaxation on NMR pulsed field gradient experiments in porous media

Mitra, P. P., Sen, P. N. (1992) Effects of surface relaxation on NMR pulsed field gradient experiments in porous media. Physica A: Statistical Mechanics and its Applications, 186 (1-2). pp. 109-114. ISSN 03784371 (ISSN)

URL: http://www.sciencedirect.com/science/article/pii/0...
DOI: 10.1016/0378-4371(92)90369-2

Abstract

We derive an expression for the magnetization M(k,t) in a pulsed fiield gradient spin echo (PFGSE) experiment for spins diffusing in a restricted geometry with relaxation at the pore walls. Exact solutions for a slab, and simple considerations for a periodic pore geometry show that the normalized amplitude M(k,t,p)/M(0, t,p) depends only weakly on the surface relaxivity p for small p. This suggests a 'factorization' that for small p, Mp(k,t) ≈ Mp(0,t) Mp=0(k,t). This factorization is useful in understanding PFGSE experiments, because Mp=0(k,t) is theoretically simpler to analyze, and is related to the structure of the pore space. © 1992.

Item Type: Paper
Subjects: Investigative techniques and equipment > magnetic resonance imaging
physics
physics > biophysics > pore dynamics
CSHL Authors:
Communities: CSHL labs > Mitra lab
Depositing User: CSHL Librarian
Date: 1992
Date Deposited: 02 Apr 2012 20:20
Last Modified: 10 Feb 2017 20:49
URI: http://repository.cshl.edu/id/eprint/25863

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