Collision-induced dissociation of Cr[sub [ital n]][sup +] ([ital n]=2--21) with Xe: Bond energies, dissociation pathways, and structures

Journal Article · Mon Nov 01 04:00:00 EST 1993 · Journal of Chemical Physics; (United States)

DOI:https://doi.org/10.1063/1.465842· OSTI ID:6130348

Su, C; Armentrout, P B ^[1]

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1. 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), Journal Name: Journal of Chemical Physics; (United States) Vol. 99:9; ISSN JCPSA6; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
664400 -- Experimentally Derived Information on Atomic & Molecular Properties-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
BEAMS
CHARGED PARTICLES
CHROMIUM IONS
COLLISIONS
DISSOCIATION
DISSOCIATION ENERGY
ELEMENTS
ENERGY
ENERGY DEPENDENCE
FLUIDS
GASES
ION BEAMS
ION COLLISIONS
ION PAIRS
ION-ATOM COLLISIONS
IONS
KINETIC ENERGY
MASS SPECTROMETERS
MEASURING INSTRUMENTS
NONMETALS
RARE GASES
SPECTROMETERS
STRUCTURE FACTORS
THRESHOLD ENERGY
XENON