| Autor: |
W. D. Basler |
| Rok vydání: |
1990 |
| Předmět: |
|
| Zdroj: |
Colloids and Surfaces. 45:435-443 |
| ISSN: |
0166-6622 |
| Popis: |
The NMR lineshape for a distribution of correlation times has been calculated by a random walk model using the local frequency approximation for isotopic reorientation and 3cos2θ−1 angular dependence. It has been found that the sharp cutoff approximation used earlier is well justified for a width parameter β ⩾ 2 for a distribution of correlation times. There are two distinct maxima in the resulting derivative spectra. In the center of the transition the width of the narrow central line is about 25% of the static splitting nearly independent of β. Within the transition range the apparent activation energy of the narrow line is 21% (β=5) to 42% (β=3) of that of the jump process. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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