期刊
JOURNAL OF CHEMICAL PHYSICS
卷 131, 期 17, 页码 -出版社
AIP Publishing
DOI: 10.1063/1.3262803
关键词
elemental semiconductors; infrared spectra; molecular clusters; molecule-photon collisions; photoionisation; silicon; ultraviolet spectra; vibrational states
资金
- Fund for Scientific Research-Flanders (FWO)
- Flemish Concerted Action [GOA/2009/06]
- Belgian Interuniversity Poles of Attraction [IAP/P5/01]
- Deutsche Forschungsgemeinschaft
- Alexander von Humboldt Foundation
- Institute for the Promotion of Innovation by Science and Technology in Flanders (IWT)
Tunable far-infrared-vacuum-ultraviolet two color ionization is used to obtain vibrational spectra of neutral silicon clusters in the gas phase. Upon excitation with tunable infrared light prior to irradiation with UV photons we observe strong enhancements in the mass spectrometric signal of specific cluster sizes. This allowed the recording of the infrared absorption spectra of Si-6, Si-7, and Si-10. Structural assignments were made by comparison with calculated linear absorption spectra from quantum chemical theory.
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