Collision-induced dissociation of Cr[sub [ital n]][sup +] ([ital n]=2--21) with Xe: Bond energies, dissociation pathways, and structures
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112 (United States)
The kinetic energy dependence of the collision-induced dissociation (CID) of Cr[sub [ital n]][sup +] ([ital n]=2--21) with xenon is studied by using a guided ion beam mass spectrometer. Examination of the general dissociation behavior over a broad collision energy range shows that chromium cluster ions dissociate primarily by sequential atom loss with a few exceptions, most notably Cr[sub 5][sup +]. Bond energies of chromium cluster ions [ital D](Cr[sub [ital n]][minus]1[sup +]--Cr) are determined from measurements of the CID thresholds. The cluster size dependence of chromium cluster bond energies shows that odd-sized clusters are more stable than even clusters for smaller clusters ([ital n][le]9) and local maxima at [ital n]=13, 14, and 20 for larger clusters. The even--odd alternation in the stability of small chromium clusters suggests that these cluster cations are bound mainly by the 4[ital s] electrons. The pattern of stability for the larger clusters, in particular, the observation that the 14- and 20-atom clusters are relatively stable, is consistent with clusters built around a dimer core.
- OSTI ID:
- 6130348
- Journal Information:
- Journal of Chemical Physics; (United States), Vol. 99:9; ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CHROMIUM IONS
ION-ATOM COLLISIONS
XENON
DISSOCIATION
DISSOCIATION ENERGY
ENERGY DEPENDENCE
ION BEAMS
ION PAIRS
KINETIC ENERGY
MASS SPECTROMETERS
STRUCTURE FACTORS
THRESHOLD ENERGY
ATOM COLLISIONS
BEAMS
CHARGED PARTICLES
COLLISIONS
ELEMENTS
ENERGY
FLUIDS
GASES
ION COLLISIONS
IONS
MEASURING INSTRUMENTS
NONMETALS
RARE GASES
SPECTROMETERS
664300* - Atomic & Molecular Physics- Collision Phenomena- (1992-)
664400 - Experimentally Derived Information on Atomic & Molecular Properties- (1992-)