Supersonic metal cluster beams. Technical progress report, March 16, 1983-March 15, 1984
Recent developments in laser and molecular beam technology have now made it possible to produce supersonic beams of metal clusters of virtually any metal in the periodic table. Initially, studies have involved the investigation of the metal-metal bond in transition metal dimers, including Cr/sub 2/, Mo/sub 2/, V/sub 2/, and Ni/sub 2/ through resonant two-photon ionization spectroscopy. These studies have demonstrated the importance of 3d (and 4d) electrons in the metal-metal bond in Cr/sub 2/, Mo/sub 2/, and V/sub 2/. A comparison of V/sub 2/ and Cr/sub 2/ illustrates the importance of the 3d contraction with increasing nuclear charge, and this is found to be of central concern in No/sub 2/, where no 3d contribution to the chemical bond is found. Finally, Cu/sub 3/ is investigated, providing the first gas-phase spectrum of a triatomic transition metal cluster. Electronically, Cu/sub 3/ is analogous to Na/sub 3/ and other alkali trimers, so it is not surprising that the observed spectrum is best explained as arising from a Jahn-Teller distorted /sup 2/E' state (in D/sub 3h/ symmetry), as has been calculated for Li/sub 3/. The observed transition in Cu/sub 3/ is assigned to be /sup 2/E'' reverse arrow /sup 2/E', with both upper and lower states undergoing Jahn-Teller distortions.
- Research Organization:
- Rice Univ., Houston, TX (United States)
- DOE Contract Number:
- AS05-78ER06035
- OSTI ID:
- 6792769
- Report Number(s):
- DOE/ER/06035-6; ON: DE84012976
- Resource Relation:
- Other Information: Portions are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CHROMIUM
DIMERIZATION
ELECTRONIC STRUCTURE
CLUSTER BEAMS
COPPER
POLYMERIZATION
DIMERS
MOLYBDENUM
NICKEL
VANADIUM
JAHN-TELLER EFFECT
LASER-RADIATION HEATING
NOZZLES
RESEARCH PROGRAMS
SUPERSONIC FLOW
BEAMS
CHEMICAL REACTIONS
ELEMENTS
FLUID FLOW
HEATING
METALS
PLASMA HEATING
TRANSITION ELEMENTS
360104* - Metals & Alloys- Physical Properties