Measurement of the dissociation energies of anionic silver clusters (Ag{sub n}{sup {minus}}, n=2{endash}11) by collision-induced dissociation

Journal Article · Mon Mar 01 04:00:00 EST 1999 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.478416· OSTI ID:321472

Spasov, V A; Lee, T H; Maberry, J P; Ervin, K M ^[1]

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1. Department of Chemistry and Chemical Physics Program, University of Nevada, Reno, Nevada 89557 (United States)

The energy-resolved collision-induced dissociation method is applied to measure the fragmentation patterns, cross sections, and dissociation energies of small anionic silver clusters (Ag{sub n}{sup {minus}},n=2{endash}11). The main reaction channels are found to be loss of atom and loss of dimer, with dimer loss favored for odd {ital n} values. The dissociation energies for the loss of atom, D{sub 0}(Ag{sub n{minus}1}{sup {minus}}{endash}Ag), show strong even{endash}odd alternation. Threshold models that account for collisional activation efficiency, kinetic shifts, and competitive shifts are employed to obtain dissociation energies. A critical examination of the models is performed using a thermochemical cycle comparing sequential atom loss with dimer loss. {copyright} {ital 1999 American Institute of Physics.}

• OSTI ID: 321472
• Journal Information: Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 11 Vol. 110; ISSN JCPSA6; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ANIONS
ATOMIC CLUSTERS
DISSOCIATION
DISSOCIATION ENERGY
FRAGMENTATION
ION-ATOM COLLISIONS
MASS SPECTRA
MASS SPECTROSCOPY
REACTIVITY
SILVER