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|Type:||Artigo de periódico|
|Title:||Raman Scattering And Luminescence In Coal And Graphite|
Gonzalez H. J.
Hernandez C. I.
|Abstract:||Raman scattering and luminescence have been observed in coal. The similarity of our results to those of disordered graphite is striking. The disorder-induced line in graphite is shown to be due to the high phonon density of states at 0 and K points of the Brillouin zone for graphite. The luminescence shows spectra having anti-stoke parts indicating the presence of multi-step processes. The Raman spectra are not affected significantly by the mineral matter contents in coal, thus our observations offer a new approach for the study of the microstructure of coal. © 1977.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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