in gain does not change the S/N ratio of the spectrum, since Paci and co-workers (1) have recently reported that selecboth the noise and signal are equally enhanced and digitized. tive-excitation pulse sequences (2-4), which are exten-Since digitizers are preceded by audio filters, which usually siv
Selective excitation and quadrupole connectivities in deuterium NMR of paramagnetic solids
β Scribed by R.J Wittebort
- Publisher
- Elsevier Science
- Year
- 1989
- Weight
- 275 KB
- Volume
- 83
- Category
- Article
- ISSN
- 0022-2364
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π SIMILAR VOLUMES
Spectral intensities of quadrupolar nuclei and the radiofrequency (rf) pulse lengths for selective and non-selective excitation of any single-quantum NMR transition in the solid state are calculated. When nuclei of the same element occupy sites which experience different electric field gradients, th
The NMR double-quantum response to a three-pulse sequence of dipolar coupled spin-l/2 pairs in powder samples spinning at the magic angle is investigated for arbitrary spinning frequencies. It is shown that double-quantum spinning sideband patterns result from the rotor modulation of the dipolar Ham