Transverse NMR relaxation as a probe of mesoscopic structure

Details Transverse NMR relaxation as a probe of mesoscopic structure Transverse NMR relaxation as a probe of mesoscopic structure

2002-10-08

arxiv.org/abs/cond-mat/0210180v2

Phys. Rev. Lett. 89, 278101 (2002)

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.89.278101

Transverse NMR relaxation in a macroscopic sample is shown to be extremely sensitive to the structure of mesoscopic magnetic susceptibility variations. Such a sensitivity is proposed as a novel kind of contrast in the NMR measurements. For suspensions of arbitrary shaped paramagnetic objects, the transverse relaxation is found in the case of a small dephasing effect of an individual object. Strong relaxation rate dependence on the objects' shape agrees with experiments on whole blood. Demonstrated structure sensitivity is a generic effect that arises in NMR relaxation in porous media, biological systems, as well as in kinetics of diffusion limited reactions.

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