TIME-DEPENDENT SELF-DIFFUSION BY NMR SPIN-ECHO

被引：138

作者：

STEPISNIK, J ^{[1
]}

机构：

[1] J STEFAN INST,LJUBLJANA 61111,SLOVENIA

来源：

PHYSICA B | 1993年 / 183卷 / 04期

关键词：

D O I：

10.1016/0921-4526(93)90124-O

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The relation between the NMR spin-echo attenuation in the magnetic field gradient and the velocity autocorrelations of molecular random migration has been derived by using the comulant expansion theorem for averaging stochastic processes. It may explain certain cases of time-dependent diffusion observed in many systems. In the limit of long correlation times it is identical to Torrey's well-known formula for spin echo attenuation due to self-diffusion. The method is used to derive the expression for spin-echo attenuation of diffusion in restricted regions.

引用

页码：343 / 350

页数：8

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