期刊
JOURNAL OF CHEMICAL PHYSICS
卷 139, 期 12, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4822324
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资金
- Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO) through the NWO-Groot scheme
The resonant multiple photon excitation of neutral niobium clusters using tunable infrared (IR) radiation leads to thermionic emission. By measuring the mass-resolved ionization yield as a function of IR wavenumber species selective IR spectra are obtained for Nb-n (n = 5-20) over the 200-350 cm(-1) spectral range. The IR resonance-enhanced multiple photon ionization spectra obtained this way are in good agreement with those measured using IR photodissociation of neutral Nb-n-Ar clusters. An investigation of the factors determining the applicability of this technique identifies the internal energy threshold towards thermionic emission in combination with a minimum required photon flux that rapidly grows as a function of excitation wavelength. (C) 2013 AIP Publishing LLC.
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