Use of the Stimulated Echo in NMR Diffusion Studies
β Scribed by Tanner, J. E.
- Book ID
- 111900333
- Publisher
- American Institute of Physics
- Year
- 1970
- Tongue
- English
- Weight
- 439 KB
- Volume
- 52
- Category
- Article
- ISSN
- 0021-9606
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π SIMILAR VOLUMES
The nonlinear stimulated echo that is generated by a sequence of three radiofrequency pulses, 90 degrees-tau(1)-90 degrees-tau(2)-45 degrees, in high magnetic fields (or at low temperatures) in the presence of pulsed or steady field gradients can be applied for measurements of the diffusion coeffici
Pulsed field gradient (PFG) NMR diffusion measurements in heterogeneous media may lead to erroneous results due to the disturbing influence of internal magnetic field gradients. Here, we present a simple theoretical model which allows one to interpret data obtained by stimulated spin echo PFG NMR in
Convection within the sample is a serious problem affecting diffusion measurements, in particular at elevated temper- atures. Convection currents are caused by small temperature gradients in the sample and cause additional signal decay that can be mistaken for faster diffusion. Recently, sophistica