## Abstract Spinβlattice relaxation mechanisms of nuclear spins in solids in the presence of low concentrations of paramagnetic centers are discussed. Apart from the electron spinβlattice relaxation mechanism, threeβspin processes involving two electron spins and a nuclear spin may also play a role
The influence of MAS on spin-lattice relaxation curves and nuclear spin excitation of half-integer spin quadrupolar nuclei in solids
β Scribed by D.E Woessner; H.K.C Timken
- Publisher
- Elsevier Science
- Year
- 1990
- Weight
- 632 KB
- Volume
- 90
- Category
- Article
- ISSN
- 0022-2364
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Determination of the NMR anisotropic magnetic shielding parameters from magic angle spinning, MAS, powder samples containing half-integer spin quadrupolar nuclei is achieved by analysis of the difference spectrum obtained with and without application of a hyperbolic secant pulse. Application of a hy