Transverse NMR relaxation in magnetically heterogeneous media

Autor:	Novikov, D. S., Kiselev, V. G.
Rok vydání:	2008
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Materials Science Condensed Matter - Soft Condensed Matter
Zdroj:	J. Magn. Reson. 195, 33 (2008)
Druh dokumentu:	Working Paper
DOI:	10.1016/j.jmr.2008.08.005
Popis:	We consider the NMR signal from a permeable medium with a heterogeneous Larmor frequency component that varies on a scale comparable to the spin-carrier diffusion length. We focus on the mesoscopic part of the transverse relaxation, that occurs due to dispersion of precession phases of spins accumulated during diffusive motion. By relating the spectral lineshape to correlation functions of the spatially varying Larmor frequency, we demonstrate how the correlation length and the variance of the Larmor frequency distribution can be determined from the NMR spectrum. We corroborate our results by numerical simulations, and apply them to quantify human blood spectra. Comment: 9 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0801.4765 Zobrazit plný text záznamu View this record from Arxiv