Accession Number : ADA237839

Title :   Structures, Properties, and Dynamics of Metal Clusters from Infrared Laser Spectroscopy.

Descriptive Note : Final rept. 1 Jan 90-31 Dec 90,

Corporate Author : CALIFORNIA UNIV BERKELEY

Personal Author(s) : Saykally, Richard J.

Report Date : 21 JUN 1991

Pagination or Media Count : 4

Abstract : Two new types of infrared spectrometers have been developed for the study of gas-phase cluster species. A tunable far-infrared (FIR) laser was combined with an apparatus for producing planar supersonic beams of laser vaporized clusters, and used in the measurement of the 64.1 cm-1 bending vibration of c sub 3. A mid-IR diode laser system was constructed with a similar cluster source, and used in studies of the C sub 4, C sub 5, C sub 7, and C sub 9 clusters. Structures and internal dynamics of the clusters were determined. Extensions to metal cluster systems are currently underway. A new type of spectrometer was developed for measuring electronic spectra of supersonic metal clusters. Cavity Ringdown Laser Absorption Spectroscopy (CRLAS) was utilized in a study of the Cu sub 3 cluster in the initial application of the method.

Descriptors :   CLUSTERING, DYNAMICS, ELECTRONIC STATES, FAR INFRARED RADIATION, INFRARED LASERS, INFRARED SPECTROMETERS, INFRARED SPECTROSCOPY, INTERMEDIATE INFRARED RADIATION, INTERNAL, LASERS, MEASUREMENT, METALS, SEMICONDUCTOR DIODES, SEMICONDUCTOR LASERS, SOURCES, SPECTRA, SPECTROMETERS, SUPERSONIC CHARACTERISTICS, TUNING.

Subject Categories : Nuclear Instrumentation
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE