Spin diffusion in multiple pulse spin-locking in solids containing paramagnetic impurities

G B Furman; S D Goren; A M Panich; A I Shames; T Nakajima

doi:10.1016/j.ssnmr.2010.11.001

Spin diffusion in multiple pulse spin-locking in solids containing paramagnetic impurities

Solid State Nucl Magn Reson. 2010 Nov;38(4):84-9. doi: 10.1016/j.ssnmr.2010.11.001. Epub 2010 Nov 24.

Authors

G B Furman¹, S D Goren, A M Panich, A I Shames, T Nakajima

Affiliation

¹ Department of Physics, Ben-Gurion University, Be'er-Sheva, Israel. gregoryf@bgu.ac.il

PMID: 21145710
DOI: 10.1016/j.ssnmr.2010.11.001

Abstract

Spin diffusion and spin-lattice relaxation in solids containing paramagnetic impurities under influence of a multiple-pulse spin-locking radio-frequency sequence are studied theoretically and experimentally. The diffusion equation obtained provides a clue for determination of the time dependent magnetization. The spin-lattice relaxation time is calculated as a function of the correlation time and multiple-pulse field parameters. From the experimental data the spin diffusion coefficient, the radius of the spin diffusion barrier, and the correlation time for very slow molecular motion in polycrystalline (C(2)F)(n) system are estimated and found to be D∼7.1×10(-12)cm(2)/s, r(c)∼4.8×10(-10)m, and τ(c)∼10.2μs, respectively.