Application of a portable nuclear magnetic resonance surface probe to porous media

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• 作者：Andriy Marko ; Bernd Wolter ; Walter Arnold
• 关键词：Nuclear magnetic resonance (NMR) ; One-sided access NMR ; Porous media ; Diffusion coefficient
• 刊名：Journal of Magnetic Resonance
• 出版年：2007
• 出版时间：March 2007
• 年：2007
• 卷：185
• 期：1
• 页码：19-27
• 全文大小：595 K

文摘

A portable nuclear magnetic resonance (NMR) surface probe was used to determine the time-dependent self-diffusion coefficient D(t) of water molecules in two fluid-filled porous media. The measuring equipment and the inhomogeneous magnetic fields in the sensitive volume of the probe are described. It is discussed how to evaluate D(t) using a surface probe from the primary and stimulated echoes generated in three-pulse experiments. Furthermore, the evaluation of D(t) allows one to determine the geometrical structure of porous materials.