| Found in Collection(s): | Click on the collection logo for more information.
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| Collection Name: | Directory of Open Access Journals: Chemistry
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| Collection Description: | The Directory of Open Access Journals (DOAJ): Chemistry indexes open-access journals in analytical chemistry, chemical engineering, general chemistry, and organic chemistry. DOAJ aims to increase the visibility and ease of use of all open-access scientific and scholarly journals that use a quality-control system, worldwide and in all languages. |
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Collection Information:
| Grade Level |
Higher Education
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| Intended Audience |
Educator
Professional/Practitioner
Researcher
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| Language |
Croatian
Czech
Slovak
Ukrainian
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| Link |
Http://www.doaj.org/ljbs?cpid=60
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| Publisher / Resource Provider |
Lund University Libraries Head Office
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| Resource Type |
Article
Collection
Periodical
Reference Material
Text
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| Subject Keyword(s) |
Chemical Engineering
Chemistry
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| Resource Title: | Excitação eletrônica das moléculas de metacrilato de metila e estireno na região do ultravioleta de vácuo
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| Description: | Angle-resolved electron energy-loss spectra have been measured for the methyl methacrylate (MMA) and styrene molecules in the 0 - 50 eV energy range. The spectra have been obtained at 1 keV incident energy, with an energy resolution of 0.8 eV and covering an angular range of 2.0 to 7.0 degrees. Within our knowledge, this is the first gas-phase excitation spectrum for MMA and styrene in this energy range. The spectra of MMA at small scattering angles are dominated by an intense peak at 6.7 eV followed by a broad band centered at about 16 eV. In the case of styrene, six bands can be observed in the spectra. Based on the angular behaviour of the excitation spectra of these molecules, the low-lying peaks observed are considered to be associated predominantly with dipole-allowed processes. In both cases, new bands can be observed for excitation energies greater than 20 eV. This could be associated with dipole-forbidden transitions to shake-up and doubly-excited states. |
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Additional Resource Information
| Author |
Lopes M. C. A.
Lucas C. A.
Rocco M. L. M.
Souza G. G. B. De
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| Date Published |
1998
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| Publisher / Resource Provider |
Sociedade Brasileira De Química
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| Subject Keyword(s) |
Excitation Energy
Methyl Methacrylate
Styrene
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