High resolution study of photoionization processes in O2
| Autor: | W. A. Chupka, P. M. Dehmer |
|---|---|
| Rok vydání: | 1975 |
| Předmět: |
Chemistry
Photoionization mode General Physics and Astronomy Photoionization Molecular physics Dissociation (psychology) Ion Autoionization Ionization Electron affinity Physics::Atomic and Molecular Clusters medicine Physics::Atomic Physics Physical and Theoretical Chemistry medicine.symptom Atomic physics Ground state |
| Zdroj: | The Journal of Chemical Physics. 62:4525-4534 |
| ISSN: | 1089-7690 0021-9606 |
| Popis: | Relative photoionization efficiency curves were determined for the production of O+2, O+, and O− from molecular oxygen in the wavelength region of the helium continuum. The photoionization efficiency curve for O+2, determined at a wavelength resolution (FWHM) of 0.07 A throughout most of the region from 1030–580 A, shows rotationless autoionization structure which is broadened due to the processes of predissociation and/or autoionization. The photoionization effciency curves for fragment ions from ion pair formation and from dissociative ionization were determined at wavelength resolutions of 0.07 and 0.15 A, respectively. The data show considerable autoionization structure and provide information about the mechanisms for these dissociation processes. The ion pair photoionization efficiency curve shows steplike structure at threshold resulting from direct ionization from individual rotational levels of the ground state of O2. A value of the electron affinity of atomic oxygen of 1.462±0.003 eV was determin... |
| Databáze: | OpenAIRE |
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