Studies of the dependence of electron spin resonance on heat treatment temperature were carried out for coal carbons made from coals of various rank. The absorption curve of coal carbons changes from Gaussian type to Lorentzian type, the line width decreases and reaches a minimum, and the spin cente
Electron Spin Resonance of Coals: Saturation Effect
โ Scribed by SMIDT, J.
- Book ID
- 109597181
- Publisher
- Nature Publishing Group
- Year
- 1958
- Tongue
- English
- Weight
- 97 KB
- Volume
- 181
- Category
- Article
- ISSN
- 0028-0836
- DOI
- 10.1038/181176a0
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๐ SIMILAR VOLUMES
Nine Canadian coals of different rank and composition were studied by electron spin resonance. For percentage of fixed carbon in the range of 43 to 78 wt%, the free radical g values were found to increase with decreasing carbon content, and did not level off for the low rank coals. The free radical
Free radical electron paramagnetic resonance (e.p.r.) spectra of coal are comprised of unresolved hyperfine multiplets with widths of ~770 kHz, (TJ', at 90-l 10 K. Unresolved hyperfine interactions are measured in the spin echo decay modulation and locate nuclei in the coal structure relative to the