Rotational resonance in a spin-lock field for solid state NMR
โ Scribed by Zhe-Hong Gan; David M. Grant
- Book ID
- 107734861
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 370 KB
- Volume
- 168
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
The internuclear distance between two homonuclear dipolar-coupled dilute spins-l/2, S\* and Sx, can be measured by mtatianal resonance experiments in solid state NMR. These involve rotating the sample at the magic angle while fulfilling the condition for rotational resonance, f&-Q,= ncu,, where Q, a
The density matrix of a spin 3/2 subject to a first-order quadrupole interaction in solids and excited by an off-resonance rf pulse, is calculated analytically using the algebraic computer program MAPLE. The results are valid for arbitrary values of the rf amplitude, co], quadrupolar coupling, WQ, a
Magnetic field gradients have proven useful in NMR for coherence pathway selection, diffusion studies, and imaging. Recently they have been combined with magic angle spinning to permit high-resolution measurements of semi-solids, where magic angle spinning averages any residual dipolar couplings and
Free induction decay (FID) signals in solid state NMR measurements performed with magic angle spinning can often be extended in time by factors on the order of 10 by a simple pulsed spin locking technique. The sensitivity of a structural measurement in which the structural information is contained i