title: Effect of magic angle spinning on (13)C spin-lattice and spin-spin relaxation in nanodiamonds.
abstract: We report on (13)C spin-lattice (R 1) and spin-spin (R 2) relaxation rate dependence on magic-angle-spinning (MAS) rate in highly purified synthetic nanodiamonds. Noticeable slowdown of both relaxation processes and reduction of nuclear spin diffusion coefficient D with increasing MAS rate was obtained. This effect is attributed to suppression of nuclear spin diffusion by MAS. We developed a theoretical approach that describes the MAS rate dependence of R 1, R 2 and D, allows quantitative analysis of the data and shows good compliance with the experiment.
authors: Department of Physics, Ben-Gurion University of the Negev, PO Box 653, Be'er Sheva 8410501, Israel.
authors: A M
authors: AM
authors: Panich
authors: N A
authors: NA
authors: Sergeev
authors: M
authors: M
authors: Olszewski