Dissociation-ionization and ionization-dissociation by multiphoton absorption of acetaldehyde at 266 and 355 nm. Dissociation pathways
The experimental results from the interaction of a sample of acetaldehyde (CH3CHO) with laser radiation at intensities between 109and1011Wcm°2and wavelengths of 266 and 355 nm are reported. As a result of multiple photon absorption, cations from ionization-dissociation(I-D) or dissociation-ionizatio...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2016 |
| País: | México |
| Institución: | Universidad Nacional Autónoma de México |
| Repositorio: | Redalyc-UNAM |
| OAI Identifier: | oai:redalyc.org:57045452004 |
| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=57045452004 |
| Access Level: | acceso abierto |
| Palabra clave: | Física, Astronomía y Matemáticas Acetaldehyde photoionization photodissociation multiphoton processes molecular dissociation |
| Sumario: | The experimental results from the interaction of a sample of acetaldehyde (CH3CHO) with laser radiation at intensities between 109and1011Wcm°2and wavelengths of 266 and 355 nm are reported. As a result of multiple photon absorption, cations from ionization-dissociation(I-D) or dissociation-ionization (D-I) processes, were detected using a reflectron time of flight mass spectrometer. The processes I-D ispredominant at 355 nm and D-I is predominant at 266 nm. The formation of different ions is discussed. From analysis of the ratios betweenthe ion currents [I(CH3CO+)+I(CO+)]/[ I(CH+3)+I(HCO+)], originated from the C-C bond or from the C-H bond breaking at different laserintensities, the predominant channels are determined. |
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