Electron spin echo envelope modulation (ESEEM) is observed in a coal sample utilizing a two-pulse sequence originally proposed by Hartmann and Hahn to generate a 'spin-locked echo'. It is experimentally shown that this spin-locked ESEEM (SLESEEM) is similar to three-pulse ESEEM rather than conventio
Electron-spin-echo envelope modulation with improved modulation depth
β Scribed by C. Gemperle; A. Schweiger; R.R. Ernst
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 592 KB
- Volume
- 178
- Category
- Article
- ISSN
- 0009-2614
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A pulsed EPR technique for generating electron-spin-echo-envelope modulations in paramagnetic systems that do not contain nonsecular hyperiine interactions is proposed. Strong continuous radio-frequency irradiation tuned to one of the unperturbed nuclear transition frequencies is shown to provide a
It is demonstrated that the spin-locked electron spin echo envelope modulation (ESEEM) experiment recently introduced by Zhong and Pilbrow [Chem. Phys. Letters 222 (1994) 5921 does not yield the same information as the conventional three-pulse ESEEM experiment because of the hyperfine decoupling inh