SPATIALLY-DISTRIBUTED PULSED GRADIENT SPIN-ECHO NMR USING SINGLE-WIRE PROXIMITY
SPATIALLY-DISTRIBUTED PULSED GRADIENT SPIN-ECHO NMR USING SINGLE-WIRE PROXIMITY
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DOI：
10.1103/physrevlett.75.4532
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发表时间：
1995-12-11
影响因子：
8.6
通讯作者：
STEPISNIK, J
中科院分区：
文献类型：
--
作者：
CALLAGHAN, PT;STEPISNIK, J
NMR显微成像可用于观察在经受电流脉冲的细线附近的分子扩散的效果。通过这种方式，脉冲梯度自旋回波技术可以利用非常大的脉冲磁场梯度，大约为100 Tm-1。梯度幅度对距离导线的距离的二次依赖性导致大的动态范围，而局部梯度矢量的分布使得可以对各向异性扩散进行成像。我们证明了这些性能的测量聚合物溶液和液晶。
NMR microimaging may be used to observe the effect of molecular diffusion in the vicinity of a thin wire subjected to current pulses. By this means the pulsed gradient spin echo technique can utilize very large pulsed magnetic field gradients, on the order of 100 Tm-1. The quadratic dependence of gradient amplitude on distance from the wire leads to large dynamic range while the distribution of local gradient vectors makes it possible to image anisotropic diffusion. We demonstrate these properties in measurements on polymer solutions and liquid crystals.