| Autor: | J. Wu, G.J. Hill, M. J. R. Hoch |
|---|---|
| Rok vydání: | 1999 |
| Předmět: | |
| Zdroj: | Hyperfine Interactions. :81-86 |
| DOI: | 10.1023/a:1017073912037 |
| Popis: | The P1 nitrogen defect centres in natural type Ia diamonds have been exploited in dynamic nuclear polarization (DNP) of the 13C nuclei (1.1% abundant) via the solid-effect. We have achieved sufficiently large 13C polarizations in some diamonds to observe weak satellite lines in the 13C NMR spectra by using long microwave irradiation times. A study of the dependence of the NMR spectra on the crystal orientation with respect to the applied magnetic field reveals that the satellite structure originates from the small fraction of 13C nuclei that are involved in nearest neighbour dipole interactions. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|