Quantum interference scattering of aligned molecules: Bonding in O-4 and role of spin coupling
Molecular beam experiments on collisions between oxygen molecules were performed at low energy and high angular resolution to permit observation of the ``glory'' interference effect. A novel technique for aligning the rotational angular momentum of the colliding molecules is exploited. Ana...
| Autores: | , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 1999 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/100467 |
| Acceso en línea: | http://hdl.handle.net/10261/100467 |
| Access Level: | acceso abierto |
| Palabra clave: | [PACS] Intermolecular and atom-molecule potentials and forces [PACS] Scattering of atoms and molecules |
| Sumario: | Molecular beam experiments on collisions between oxygen molecules were performed at low energy and high angular resolution to permit observation of the ``glory'' interference effect. A novel technique for aligning the rotational angular momentum of the colliding molecules is exploited. Analysis of total scattering cross section data yields for the O2-O2 bond an energy of 1.65+/-0.08 kJ˙mol-1 for the most stable configuration (parallel molecules) at a distance of 0.356+/-0.007 nm. These results indicate that most of the bonding in the dimer comes from electrostatic (van der Waals) forces but chemical (spin-spin) contributions are not negligible. |
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