The magic numbers of metal and metal alloy clusters

Journal Article · Tue Sep 15 00:00:00 EDT 1992 · Journal of Chemical Physics; (United States)

DOI:https://doi.org/10.1063/1.463898· OSTI ID:7156645

Yamada, Y; Castleman, Jr, A W ^[1]

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1. Department of Chemistry, Pennsylvania State University, University Park, Pennsylvania 16802 (United States)

Pure metal and metal alloy clusters including Cu{sub {ital n}}, Ag{sub {ital n}}, Cu{sub {ital n}}Ag{sub {ital m}}, Cu{sub {ital n}}Al{sub {ital m}}, Cu{sub {ital n}}In{sub {ital m}}, Ag{sub {ital n}}Al{sub {ital m}}, Ag{sub {ital n}}In{sub {ital m}}, and Cu{sub {ital n}}Pb{sub {ital m}} are produced by a gas aggregation source and investigated by time-of-flight mass spectrometry following ionization with a KrF excimer laser. In the case of pure metal clusters (Cu{sub {ital n}},Ag{sub {ital n}},In{sub {ital n}}), as well as alloy clusters composed of these metals, magic numbers are observed in their cluster ions which correspond to jellium shell closings (counting the total valence electrons from the component metals). These findings are in good agreement with their expected free-electron behavior. Interestingly, the abundance of pure Pb{sub {ital n}}{sup +} corresponds to species which are expected to be especially stable due to their geometric structure. A similar situation also arises for the Pb-rich alloy clusters. By contrast, the metal alloy clusters Cu{sub {ital n}}Pb{sub {ital m}}{sup +} show magic numbers at jellium shell closing in the series of Cu-rich clusters.

• DOE Contract Number: FG02-88ER60668
• OSTI ID: 7156645
• Journal Information: Journal of Chemical Physics; (United States), Vol. 97:6; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ALUMINIUM ALLOYS
MAGIC NUCLEI
COPPER
COPPER ALLOYS
INDIUM ALLOYS
LEAD ALLOYS
SILVER
SILVER ALLOYS
AGGLOMERATION
BINARY ALLOY SYSTEMS
ELECTRONIC STRUCTURE
EXCIMER LASERS
GASES
GEOMETRY
ION PAIRS
IONIZATION
MASS SPECTROSCOPY
TIME-OF-FLIGHT METHOD
ALLOY SYSTEMS
ALLOYS
ELEMENTS
FLUIDS
GAS LASERS
LASERS
MATHEMATICS
METALS
NUCLEI
SPECTROSCOPY
TRANSITION ELEMENTS
664500* - Special Atoms & Molecules- (1992-)