Collision-induced dissociation of Ni sup + sub n ( n =2--18) with Xe: Bond energies, geometrical structures, and dissociation pathways

Journal Article · Fri May 15 04:00:00 EDT 1992 · Journal of Chemical Physics; (United States)

DOI:https://doi.org/10.1063/1.462406· OSTI ID:7300707

Lian, L; 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 Ni{sup +}{sub {ital n}} ({ital n}=2--18) with xenon is studied by using a guided ion beam mass spectrometer. Bond energies of nickel cluster ions, {ital D}{sup 0}(Ni{sup +}{sub {ital n}{minus}1}--Ni), are determined from measurements of the CID thresholds. Bond energies for neutral nickel clusters, {ital D}{sup 0}(Ni{sub {ital n}{minus}1}--Ni), are derived by combining these ionic bond energies with literature values of ionization energies for Ni{sub {ital n}}. Both {ital D}{sup 0}(Ni{sup +}{sub {ital n}{minus}1}--Ni) and {ital D}{sup 0}(Ni{sub {ital n}{minus}1}--Ni) are found to increase nonmonotonically as a function of cluster size, with local maxima at {ital n}=3, 7, and 13 for ionic clusters and at {ital n}=6 and 13 for neutral clusters. Examination of the cluster size dependence of nickel cluster bond energies leads to speculations on the likely cluster geometric structures. Examination of the general dissociation behavior over a broad collision energy range shows that nickel cluster ions dissociate primarily by sequential atom loss, although exceptions are noted.

• OSTI ID: 7300707
• Journal Information: Journal of Chemical Physics; (United States), Journal Name: Journal of Chemical Physics; (United States) Vol. 96:10; ISSN JCPSA; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
BEAMS
BINDING ENERGY
CHARGED PARTICLES
COLLISIONS
DISSOCIATION
ELEMENTS
ENERGY
ENERGY DEPENDENCE
FLUIDS
GASES
GEOMETRY
ION BEAMS
ION COLLISIONS
ION PAIRS
ION-ATOM COLLISIONS
IONS
KINETIC ENERGY
MASS SPECTROSCOPY
MATHEMATICS
NICKEL IONS
NONMETALS
RARE GASES
SIZE
SPECTROSCOPY
THRESHOLD ENERGY
XENON