Delayed ionization and delayed atomic ion emission of Ti and V metallocarbohedrenes. Evidence for collective electronic effects
| Autor: | B. D. May, A. W. Castleman, S. F. Cartier |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
Chemistry
Astrophysics::High Energy Astrophysical Phenomena Atomic emission spectroscopy General Physics and Astronomy Thermionic emission Laser Ion source law.invention Ion law Excited state Ionization Physics::Atomic and Molecular Clusters Physics::Atomic Physics Physical and Theoretical Chemistry Atomic physics Electron ionization |
| Zdroj: | Chemical Physics Letters. 242:265-272 |
| ISSN: | 0009-2614 |
| DOI: | 10.1016/0009-2614(95)00739-q |
| Popis: | Investigations of the ionization of titanium and vanadium carbon clusters reveal prompt ionization for the entire range of species produced, and a significant delayed ion signal for the metallocarbohedrenes (Met-Cars), M 8 C 12 . At high laser fluences, emission of delayed atomic metal ions is also observed as a second ionization channel. Neither channel exhibits a dependence on excitation wavelength, but strong laser fluence dependencies are seen. The findings are consistent with thermionic emission from the Met-Car. Delayed atomic emission resulting from further excitation to highly excited states of Met-Cars occurs in an energy range where a giant dipole resonance has been predicted. |
| Databáze: | OpenAIRE |
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