Pulsed ENDOR Spectroscopy at Large Thermal Spin Polarizations and the Absolute Sign of the Hyperfine Interaction
✍ Scribed by M.T. Bennebroek; J. Schmidt
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 194 KB
- Volume
- 128
- Category
- Article
- ISSN
- 1090-7807
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✦ Synopsis
It is shown that in pulsed Mims-type ENDOR experiments perthe conventional range of 9-35 GHz. The main advantages formed at 95 GHz and 1.2 K the sign of the ENDOR signal can are the high spectral resolution and the high absolute sensibe positive, corresponding to an increase of the stimulated echo tivity that can be obtained not only for EPR but also for intensity, as well as negative, corresponding to a decrease of the ENDOR spectroscopy. By using pulsed techniques one adds stimulated echo. The positive ''anomalous'' sign is not observed the advantages of time-resolved operation including the at conventional EPR frequencies. It is explained that the effect study of transient species. In a number of pulsed ENDOR arises through spin-lattice relaxation in the situation of large therstudies at 95 GHz it was demonstrated that the technique mal spin polarizations and that it allows the determination of the not only works routinely but that it can supply information absolute sign of the hyperfine interaction. ᭧ 1997 Academic Press about systems that cannot be studied with ENDOR techniques at the conventional microwave frequencies for reasons of sensitivity and/or resolution. Examples are a study 199