Physics NotePublished
Spin Echo Amplitude in Pulsed NMR: Effects of Electric Quadrupole Interaction
R. R. Sobral; X. A. Silva; A. P. Guimarães
1986
Publication details
- Authors
- R. R. Sobral; X. A. Silva; A. P. Guimarães
- Type
- Physics Note
- Status
- Published
- Publication date
- 1986
- Description
- In ferromagnetic systems where the NMR spectra present unresolved electric quadrupole interactions the spin echo amplitude shows an oscillatory behaviour as a function of the time separation <math>\tau\,\!</math> between excitation pulses. These oscillations are in general attenuated. In the present work spin echo amplitudes are numerically computed, using a simple algorithm. The calculation is made for several values of the nuclear spin I and for different excitation conditions. The curves are compared with available analytical calculations. The amplitudes of the multiple spin echoes (for I > 1) are also obtained. The calculation is extended to the case of non-axially symmetric electric field gradients (EFG's) and to inhomogeneous EFG's; the attenuation in the corresponding amplitudes confirms that these conditions explain curves observed experimentally.
- Year
- 1986
- Number
- CBPF-NF-049/86
- Linked to a thesis
- No
- Linked to a grant
- No