| Autor: |
D. van Ormondt, B.J Pronk, R. de Beer, H Barkhuijsen |
| Rok vydání: |
1985 |
| Předmět: |
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| Zdroj: |
Journal of Magnetic Resonance (1969). 61:284-293 |
| ISSN: |
0022-2364 |
| DOI: |
10.1016/0022-2364(85)90083-6 |
| Popis: |
The existing theory of electron spin-echo envelope modulation (ESEEM) is extended to the case where a hyperfine manifold is excited only partially. The extension is important for application of ESEEM to analytical work. The theory has been worked out for three-pulse echo experiments. In a regular experiment, where one sweeps the time between the first and third pulse, partial excitation affects the amplitudes of the modulation components, but new components do not arise. When one sweeps the time between the first and second pulse, partial excitation causes new modulation components at combination frequencies. The theory can be tested by spectral analysis of the suppression effect, a phenomenon inherent to three-pulse ESEEM. Satisfactory agreement between theory and experiment is found. Data processing is done with the aid of FFT and autoregressive modeling. A preliminary result of data processing using linear prediction combined with least-squares fitting and singular value decomposition is given. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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